substantive

defining rights and duties as opposed to giving the rules by which rights and duties are established

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

having a firm basis in reality and being therefore important, meaningful, or considerable

being on topic and prompting thought

any word or group of words functioning as a noun

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.