proadjective

As nouns the difference between terms and proadjective

is that terms is while proadjective is (linguistics) a term that is not an adjective but serves the same purpose, as so in "it is less so than we had expected".

As nouns the difference between adjective and proadjective

is that adjective is a word that modifies a noun or describes a noun’s referent while proadjective is a term that is not an adjective but serves the same purpose, as so in "It is less so than we had expected".

As an adjective adjective

is incapable of independent function.

As a verb adjective

is to make an adjective of; to form or convert into an adjective.