Challenging: alternatives and connections

Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Not easily penetrated, cut, or separated into parts; not yielding to pressure; firm; solid; compact; -- applied to material bodies, and opposed to so…

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Not easily penetrated, cut, or separated into parts; not yielding to pressure; firm; solid; compact; -- applied to material bodies, and opposed to so…

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Serving or tending to provoke, excite, or stimulate; exciting.

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Serving or tending to provoke, excite, or stimulate; exciting.

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

of Stimulate

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

of Stimulate

Open English WordNet links these adjective senses as similar in meaning; they are not necessarily interchangeable.

Possessing, or controlled by, ambition; greatly or inordinately desirous of power, honor, office, superiority, or distinction.

Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.

of Intrigue

Open English WordNet places these words in at least one shared synset. They share a lexicalised sense, but context, register and collocation should still be checked before substitution.