weasel vs doer

weasel and doer both are nouns.

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

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

Other hypernyms of weasel include actor, worker.

weasel (noun)	doer (noun)
small carnivorous mammal with short legs and elongated body and neck	a person who acts and gets things done
a person who is regarded as treacherous or sneaky