morass vs bog

morass and bog both are nouns.

Word	Noun	Adjective	Verb	Adverb
morass	Yes	No	No	No
bog	Yes	No	Yes	No

As nouns, bog is a hypernym of morass; that is, bog is a word with a broader meaning than morass:

morass: a soft wet area of low-lying land that sinks underfoot
bog: wet spongy ground of decomposing vegetation; has poorer drainage than a swamp; soil is unfit for cultivation but can be cut and dried and used for fuel

Other hypernyms of morass include peat bog.

morass (noun)	bog (noun)
a soft wet area of low-lying land that sinks underfoot	wet spongy ground of decomposing vegetation; has poorer drainage than a swamp; soil is unfit for cultivation but can be cut and dried and used for fuel

morass (verb)	bog (verb)
	cause to slow down or get stuck
	get stuck while doing something