substantive

1. (grammar) a word that names a person, place, thing or idea; a noun (sensu stricto)
2. Part of a text that carries the meaning, such as words and their ordering.

verb

(grammar) to make a word belonging to another part of speech into a substantive (that is, a noun) or use it as a noun

1. Of the essence or essential element of a thing; as, "substantive information"
2. Having substance; enduring; solid; firm; substantial
3. Applying to essential legal principles and rules of right; as, "substantive law"
4. Of a dye that does not need the use of a mordant to be made fast to that which is being dyed
5. Depending on itself; independent.
6. (grammar) used like a noun substantive
7. (of a rank or appointment) actually and legally held, as distinct from an acting, temporary or honorary rank or appointment