busby vs bearskin

busby and bearskin both are nouns.

Word	Noun	Adjective	Verb	Adverb
busby	Yes	No	No	No
bearskin	Yes	No	No	No

As nouns, busby and bearskin are synonyms defined as:

busby and bearskin: tall hat; worn by some British soldiers on ceremonial occasions

Other synonyms of busby include shako.

busby (noun)	bearskin (noun)
tall hat; worn by some British soldiers on ceremonial occasions	tall hat; worn by some British soldiers on ceremonial occasions
	the pelt of a bear