inundate vs swamp

inundate is not a noun while swamp is a noun.

Word	Noun	Adjective	Verb	Adverb
inundate	No	No	Yes	No
swamp	Yes	No	Yes	No

As verbs, inundate and swamp are synonyms defined as:

Other synonyms of inundate include deluge, flood.

inundate (noun)	swamp (noun)
	low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog
	a situation fraught with difficulties and imponderables

inundate (verb)	swamp (verb)
fill or cover completely, usually with water	fill quickly beyond capacity; as with a liquid
fill quickly beyond capacity; as with a liquid	drench or submerge or be drenched or submerged