castor

(noun) a multiple star with 6 components; second brightest in Gemini; close to Pollux. Synonyms: Castor, Alpha Geminorum.

(noun) a shaker with a perforated top for sprinkling powdered sugar. Synonyms: caster.

(noun) a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable. Synonyms: caster.

(noun) a hat made with the fur of a beaver (or similar material). Synonyms: beaver.

(noun) type genus of the Castoridae: beavers. Synonyms: Castor, genus Castor.