bedmate vs doer

bedmate and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bedmate	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of bedmate; that is, doer is a word with a broader meaning than bedmate:

Other hypernyms of bedmate include actor, worker.

bedmate (noun)	doer (noun)
a person with whom you share a bed	a person who acts and gets things done