beaver vs helmet

beaver and helmet both are nouns.

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

beaver (noun)	helmet (noun)
large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges	a protective headgear made of hard material to resist blows
a hat made with the fur of a beaver (or similar material)	armor plate that protects the head
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)	helmet (verb)
work hard on something