boggy vs marshy

boggy and marshy both are adjectives.

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

As adjectives, boggy and marshy are synonyms defined as:

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

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