swamp hare vs wood rabbit

swamp hare and wood rabbit both are nouns.

Word	Noun	Adjective	Verb	Adverb
swamp hare	Yes	No	No	No
wood rabbit	Yes	No	No	No

As nouns, wood rabbit is a hypernym of swamp hare; that is, wood rabbit is a word with a broader meaning than swamp hare:

swamp hare: a wood rabbit of southeastern United States swamps and lowlands
wood rabbit: common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)

Other hypernyms of swamp hare include cottontail, cottontail rabbit.

swamp hare (noun)	wood rabbit (noun)
a wood rabbit of southeastern United States swamps and lowlands	common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)