sight vs inundation

sight and inundation both are nouns.

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

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

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

sight (noun)	inundation (noun)
the act of looking or seeing or observing	the rising of a body of water and its overflowing onto normally dry land
the ability to see; the visual faculty	an overwhelming number or amount
an instance of visual perception
the range of vision
a range of mental vision
a place of interest, especially to visitors
anything that is seen
(often followed by `of') a large number or amount or extent

sight (verb)	inundation (verb)
catch sight of; to perceive with the eyes
take aim by looking through the sights of a gun (or other device)