mess vs inundation

mess and inundation both are nouns.

Word	Noun	Adjective	Verb	Adverb
mess	Yes	No	Yes	No
inundation	Yes	No	No	No

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

Other hyponyms of mess include deluge, flood, torrent, haymow.

mess (noun)	inundation (noun)
a (large) military dining room where service personnel eat or relax	the rising of a body of water and its overflowing onto normally dry land
a meal eaten in a mess hall by service personnel	an overwhelming number or amount
soft semiliquid food
(often followed by `of') a large number or amount or extent
a state of confusion and disorderliness
informal terms for a difficult situation

mess (verb)	inundation (verb)
make a mess of or create disorder in
eat in a mess hall