Noun

1. The soft brown fur of the beaver
2. A native or resident of oregon
3. A full beard
4. A man's hat with a tall crown; usually covered with silk or with beaver fur
5. A movable piece of armor on a medieval helmet used to protect the lower face
6. A hat made with the fur of a beaver (or similar material)
7. Large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges

Verb

1. Work hard on something