fisher vs fisher cat

fisher and fisher cat both are nouns.

Word	Noun	Adjective	Verb	Adverb
fisher	Yes	No	No	No
fisher cat	Yes	No	No	No

As nouns, fisher and fisher cat are synonyms defined as:

fisher and fisher cat: large dark brown North American arboreal carnivorous mammal

Other synonyms of fisher include black cat, Martes pennanti, pekan.

fisher (noun)	fisher cat (noun)
large dark brown North American arboreal carnivorous mammal	large dark brown North American arboreal carnivorous mammal
someone whose occupation is catching fish