linking verb vs copulative

linking verb and copulative both are nouns.

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

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

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

Other synonyms of linking verb include copula.

linking verb (noun)	copulative (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

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