beard vs beaver

beard and beaver both are nouns.

Word	Noun	Adjective	Verb	Adverb
beard	Yes	No	Yes	No
beaver	Yes	No	Yes	No

As nouns, beaver is a hyponym of beard; that is, beaver is a word with a more specific, narrower meaning than beard:

Other hyponyms of beard include fuzz, imperial, imperial beard, goatee, stubble, vandyke, vandyke beard, Attilio, soul patch.

beard (noun)	beaver (noun)
tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface	large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
hairy growth on or near the face of certain mammals	a hat made with the fur of a beaver (or similar material)
the hair growing on the lower part of a man's face	a movable piece of armor on a medieval helmet used to protect the lower face
a person who diverts suspicion from someone (especially a woman who accompanies a male homosexual in order to conceal his homosexuality)	a man's hat with a tall crown; usually covered with silk or with beaver fur
a tuft or growth of hairs or bristles on certain plants such as iris or grasses	a full beard
	the soft brown fur of the beaver

beard (verb)	beaver (verb)
go along the rim, like a beard around the chin	work hard on something