hare vs leveret

hare and leveret both are nouns.

Word	Noun	Adjective	Verb	Adverb
hare	Yes	No	Yes	No
leveret	Yes	No	No	No

As nouns, leveret is a hyponym of hare; that is, leveret is a word with a more specific, narrower meaning than hare:

hare: swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs; young born furred and with open eyes
leveret: a young hare especially one in its first year

hare (noun)	leveret (noun)
swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs; young born furred and with open eyes	a young hare especially one in its first year
flesh of any of various rabbits or hares (wild or domesticated) eaten as food

hare (verb)	leveret (verb)
run quickly, like a hare