large civet vs civet cat

large civet and civet cat both are nouns.

Word	Noun	Adjective	Verb	Adverb
large civet	Yes	No	No	No
civet cat	Yes	No	No	No

As nouns, civet cat is a hypernym of large civet; that is, civet cat is a word with a broader meaning than large civet:

Other hypernyms of large civet include civet.

large civet (noun)	civet cat (noun)
common civet of India and southeast Asia	cat-like mammal typically secreting musk used in perfumes
	raccoon-like omnivorous mammal of Mexico and the southwestern United States having a long bushy tail with black and white rings