quagmire vs morass

quagmire and morass both are nouns.

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

As nouns, quagmire and morass are synonyms defined as:

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

Other synonyms of quagmire include mire, quag, slack.

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