identify vs link up

identify and link up both are verbs.

Word	Noun	Adjective	Verb	Adverb
identify	No	No	Yes	No
link up	No	No	Yes	No

As verbs, link up is a hypernym of identify; that is, link up is a word with a broader meaning than identify:

Other hypernyms of identify include associate, colligate, connect, link, relate, tie in.

identify (verb)	link up (verb)
recognize as being; establish the identity of someone or something	make a logical or causal connection
identify as in botany or biology, for example	connect, fasten, or put together two or more pieces
consider to be equal or the same	be or become joined or united or linked
conceive of as united or associated
consider (oneself) as similar to somebody else
give the name or identifying characteristics of; refer to by name or some other identifying characteristic property