hook up vs attach

hook up and attach both are verbs.

Word	Noun	Adjective	Verb	Adverb
hook up	No	No	Yes	No
attach	No	No	Yes	No

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

hook up (verb)	attach (verb)
connect or link	become attached
	cause to be attached
	be attached; be in contact with
	take temporary possession of as a security, by legal authority
	create social or emotional ties