copulative vs linking verb

copulative and linking verb both are nouns.

Word	Noun	Adjective	Verb	Adverb
copulative	Yes	Yes	No	No
linking verb	Yes	No	No	No

As nouns, copulative and linking verb are synonyms defined as:

copulative and linking verb: an equating verb (such as `be' or `become') that links the subject with the complement of a sentence

Other synonyms of copulative include copula.

copulative (noun)	linking verb (noun)
an equating verb (such as `be' or `become') that links the subject with the complement of a sentence	an equating verb (such as `be' or `become') that links the subject with the complement of a sentence

copulative (adjective)	linking verb (adjective)
syntactically connecting sentences or elements of a sentence