beaver vs beaver fur

beaver and beaver fur both are nouns.

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

As nouns, beaver and beaver fur are synonyms defined as:

beaver (noun)	beaver fur (noun)
large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges	the soft brown fur of the beaver
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)	beaver fur (verb)
work hard on something