fossa vs fossa cat

fossa and fossa cat both are nouns.

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

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

fossa and fossa cat: largest carnivore of Madagascar; intermediate in some respects between cats and civets

Other synonyms of fossa include Cryptoprocta ferox.

fossa (noun)	fossa cat (noun)
largest carnivore of Madagascar; intermediate in some respects between cats and civets	largest carnivore of Madagascar; intermediate in some respects between cats and civets
a concavity in a surface (especially an anatomical depression)