swamp hare vs swamp rabbit

swamp hare and swamp rabbit both are nouns.

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

As nouns, swamp hare and swamp rabbit are synonyms defined as:

swamp hare and swamp rabbit: a wood rabbit of southeastern United States swamps and lowlands

Other synonyms of swamp hare include canecutter, Sylvilagus aquaticus.

swamp hare (noun)	swamp rabbit (noun)
a wood rabbit of southeastern United States swamps and lowlands	a wood rabbit of southeastern United States swamps and lowlands
	a wood rabbit of marshy coastal areas from North Carolina to Florida