adjoin vs attach

adjoin and attach both are verbs.

Word	Noun	Adjective	Verb	Adverb
adjoin	No	No	Yes	No
attach	No	No	Yes	No

As verbs, attach is a hyponym of adjoin; that is, attach is a word with a more specific, narrower meaning than adjoin:

adjoin (verb)	attach (verb)
attach or add	become attached
lie adjacent to another or share a boundary	cause to be attached
be in direct physical contact with; make contact	be attached; be in contact with
	take temporary possession of as a security, by legal authority
	create social or emotional ties