gnawing mammal vs coney

gnawing mammal and coney both are nouns.

Word	Noun	Adjective	Verb	Adverb
gnawing mammal	Yes	No	No	No
coney	Yes	No	No	No

As nouns, coney is a hyponym of gnawing mammal; that is, coney is a word with a more specific, narrower meaning than gnawing mammal:

gnawing mammal: relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing
coney: small short-eared burrowing mammal of rocky uplands of Asia and western North America

Other hyponyms of gnawing mammal include Duplicidentata, leporid, leporid mammal, cony, mouse hare, pika, rock rabbit.

gnawing mammal (noun)	coney (noun)
relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing	black-spotted usually dusky-colored fish with reddish fins
	any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food
	small short-eared burrowing mammal of rocky uplands of Asia and western North America
	any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes