link up vs relate

link up and relate both are verbs.

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

As verbs, link up and relate are synonyms defined as:

Other synonyms of link up include associate, colligate, connect, link, tie in.

link up (verb)	relate (verb)
make a logical or causal connection	make a logical or causal connection
connect, fasten, or put together two or more pieces	give an account of; narrate
be or become joined or united or linked	have or establish a relationship to
	be relevant to
	be in a relationship with