Substantive

Betokening or expressing existence; as, the substantive verb, that is, the verb to be.

Depending on itself; independent.

Enduring; solid; firm; substantial.

Pertaining to, or constituting, the essential part or principles; as, the law substantive.

A noun or name; the part of speech which designates something that exists, or some object of thought, either material or immaterial; as, the words man, horse, city, goodness, excellence, are substantives.

To substantivize.

any word or group of words functioning as a noun