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Efficacy: alternatives and connections

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26,102 words currently have published synonym-style alternatives
90,593 searchable synonym connections
350,924 published thesaurus relationships of every type
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Efficacy

Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer.

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49 useful connections shown 8 reviewed relationships and 41 broader connections.
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Reviewed alternatives and contrasts

These links were deliberately created. Use the interchangeability score and guidance to judge whether a word will work in your sentence.

Broader term 2

Effectiveness 76% connected

The quality of being effective.

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a broader lexical category for at least one sense.

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Effectualness 76% connected

The quality of being effectual.

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a broader lexical category for at least one sense.

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Derivationally related 2

Efficacious 74% connected

Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

oewn 2023 15% interchangeable

Open English WordNet records a derivational relationship between these word forms.

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Efficacious 74% connected

Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

oewn 2023 15% interchangeable

Open English WordNet records a derivational relationship between these word forms.

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Attribute 4

Efficacious 66% connected

Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

oewn 2023 0% interchangeable

Open English WordNet links these concepts through an attribute relationship.

Definition Compare both words
Efficacious 66% connected

Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.

oewn 2023 0% interchangeable

Open English WordNet links these concepts through an attribute relationship.

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Inefficacious 66% connected

Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.

oewn 2023 0% interchangeable

Open English WordNet links these concepts through an attribute relationship.

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Inefficacious 66% connected

Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.

oewn 2023 0% interchangeable

Open English WordNet links these concepts through an attribute relationship.

Definition Compare both words
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Words from the same subject

These terms belong to the same specialist field or topic. They help you explore the subject, but they are not automatically synonyms.

Arsenical noun · 86% connection

a pesticide or drug containing arsenic

Used in the same subject area: Medicine and healthcare, Pharmacology, Environmental science, Pollution.
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Birthmark noun · 86% connection

a blemish on the skin that is formed before birth

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Cardiac insufficiency noun · 86% connection

inadequate blood flow to the heart muscles; can cause angina pectoris

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Conflict of interest noun · 86% connection

a situation in which a public official's decisions are influenced by the official's personal interests

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Coronary insufficiency noun · 86% connection

inadequate blood flow to the heart muscles; can cause angina pectoris

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Efficaciousness noun · 86% connection

capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"

Used in the same subject area: Medicine and healthcare, Pharmacology, Clinical research, Environmental science, Pollution, Water and aquatic environments.
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Insufficiency noun · 86% connection

(pathology) inability of a bodily part or organ to function normally

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Mole noun · 86% connection

a small congenital pigmented spot on the skin

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Nevus noun · 86% connection

a blemish on the skin that is formed before birth

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Potency noun · 86% connection

capacity to produce strong physiological or chemical effects; "the toxin's potency"; "the strength of the drinks"

Used in the same subject area: Medicine and healthcare, Pharmacology, Environmental science, Pollution, Water and aquatic environments.
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Resistance noun · 86% connection

the degree of unresponsiveness of a disease-causing microorganism to antibiotics or other drugs (as in penicillin-resistant bacteria)

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Strength noun · 86% connection

capacity to produce strong physiological or chemical effects; "the toxin's potency"; "the strength of the drinks"

Used in the same subject area: Medicine and healthcare, Pharmacology, Environmental science, Pollution, Water and aquatic environments.
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Verruca noun · 86% connection

(pathology) a firm abnormal elevated blemish on the skin; caused by a virus

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Wart noun · 86% connection

(pathology) a firm abnormal elevated blemish on the skin; caused by a virus

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution, Water and aquatic environments.
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Quality noun · 85% connection

an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained" - Shakespeare

Used in the same subject area: Environmental science, Pollution, Water and aquatic environments.
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Water noun · 85% connection

a liquid necessary for the life of most animals and plants; "he asked for a drink of water"

Used in the same subject area: Environmental science, Pollution, Water and aquatic environments.
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Wetland noun · 85% connection

a low area where the land is saturated with water

Used in the same subject area: Environmental science, Pollution, Water and aquatic environments.
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Uric acid noun · 85% connection

a white tasteless odorless crystalline product of protein metabolism; found in the blood and urine

Used in the same subject area: Medicine and healthcare, Environmental science, Pollution.
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Words connected by meaning

Their definitions overlap or refer to similar ideas. Use these to widen your search, then compare the exact meanings.

Action noun · 78% connection

A process or condition of acting or moving, as opposed to rest; the doing of something; exertion of power or force, as when one body a…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Agent noun · 78% connection

An active power or cause; that which has the power to produce an effect; as, a physical, chemical, or medicinal agent; as, heat is a p…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Antihistamine noun · 78% connection

a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a recept…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Antitoxine noun · 78% connection

A substance (sometimes the product of a specific micro-organism and sometimes naturally present in the blood or tissues of an animal),…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
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Citric acid cycle noun · 78% connection

in all plants and animals: a series of enzymatic reactions in mitochondria involving oxidative metabolism of acetyl compounds to produ…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Consumption of materials noun · 78% connection

the expenditure in specific terms (per unit of production) of material resources (basic and auxiliary materials, fuel, energy, and dep…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Contrastimulant adjective · 78% connection

Counteracting the effects of stimulants; relating to a course of medical treatment based on a theory of contrastimulants.

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Corrective noun · 78% connection

That which has the power of correcting, altering, or counteracting what is wrong or injurious; as, alkalies are correctives of acids;…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Dynamical adjective · 78% connection

Of or pertaining to dynamics; belonging to energy or power; characterized by energy or production of force.

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Effective adjective · 78% connection

Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an ef…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Effectual noun · 78% connection

Producing, or having adequate power or force to produce, an intended effect; adequate; efficient; operative; decisive.

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
Definition Compare
Erg noun · 78% connection

The unit of work or energy in the C. G. S. system, being the amount of work done by a dyne working through a distance of one centimete…

Its definition shares important concepts with this word: power, produce, effects, operation, energy.
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