backup man vs compeer

backup man and compeer both are nouns.

Word	Noun	Adjective	Verb	Adverb
backup man	Yes	No	No	No
compeer	Yes	No	No	No

As nouns, compeer is a hypernym of backup man; that is, compeer is a word with a broader meaning than backup man:

backup man: someone who takes the place of another (as when things get dangerous or difficult)
compeer: a person who is of equal standing with another in a group

Other hypernyms of backup man include equal, match, peer.

backup man (noun)	compeer (noun)
someone who takes the place of another (as when things get dangerous or difficult)	a person who is of equal standing with another in a group