quagmire vs quag

quagmire and quag both are nouns.

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

As nouns, quagmire and quag are synonyms defined as:

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

Other synonyms of quagmire include mire, morass, slack.

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