beaver vs fur hat

beaver and fur hat both are nouns.

Word	Noun	Adjective	Verb	Adverb
beaver	Yes	No	Yes	No
fur hat	Yes	No	No	No

As nouns, fur hat is a hypernym of beaver; that is, fur hat is a word with a broader meaning than beaver:

beaver (noun)	fur hat (noun)
large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges	a hat made of fur
a hat made with the fur of a beaver (or similar material)
a movable piece of armor on a medieval helmet used to protect the lower face
a man's hat with a tall crown; usually covered with silk or with beaver fur
a full beard
the soft brown fur of the beaver

beaver (verb)	fur hat (verb)
work hard on something