bog vs morass

bog and morass both are nouns.

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

As nouns, morass is a hyponym of bog; that is, morass is a word with a more specific, narrower meaning than bog:

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
morass: a soft wet area of low-lying land that sinks underfoot

Other hyponyms of bog include mire, quag, quagmire, slack, slough.

bog (noun)	morass (noun)
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	a soft wet area of low-lying land that sinks underfoot

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