attach vs conjoin

attach and conjoin both are verbs.

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

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

Other hypernyms of attach include join.

attach (verb)	conjoin (verb)
become attached	make contact or come together
cause to be attached	take in marriage; married
be attached; be in contact with
take temporary possession of as a security, by legal authority
create social or emotional ties