swamp buggy vs marsh buggy

swamp buggy and marsh buggy both are nouns.

Word	Noun	Adjective	Verb	Adverb
swamp buggy	Yes	No	No	No
marsh buggy	Yes	No	No	No

As nouns, swamp buggy and marsh buggy are synonyms defined as:

swamp buggy and marsh buggy: an amphibious vehicle typically having four-wheel drive and a raised body

swamp buggy (noun)	marsh buggy (noun)
an amphibious vehicle typically having four-wheel drive and a raised body	an amphibious vehicle typically having four-wheel drive and a raised body