swampy vs marshy

swampy and marshy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
swampy	No	Yes	No	No
marshy	No	Yes	No	No

As adjectives, swampy and marshy are synonyms defined as:

Other synonyms of swampy include boggy, miry, mucky, muddy, quaggy, sloppy, sloughy, soggy, squashy, waterlogged.

swampy (adjective)	marshy (adjective)
(of soil) soft and watery	(of soil) soft and watery