animal fat vs bone fat

animal fat and bone fat both are nouns.

Word	Noun	Adjective	Verb	Adverb
animal fat	Yes	No	No	No
bone fat	Yes	No	No	No

As nouns, bone fat is a hyponym of animal fat; that is, bone fat is a word with a more specific, narrower meaning than animal fat:

animal fat: any fat obtained from animals
bone fat: fatty matter in bones extracted with solvents or by boiling or steaming; used chiefly in candles and cheap soaps and in lubricating greases

Other hyponyms of animal fat include butterfat.

animal fat (noun)	bone fat (noun)
any fat obtained from animals	fatty matter in bones extracted with solvents or by boiling or steaming; used chiefly in candles and cheap soaps and in lubricating greases