flock vs inundation

flock and inundation both are nouns.

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

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

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

flock (noun)	inundation (noun)
a group of birds	the rising of a body of water and its overflowing onto normally dry land
a group of sheep or goats	an overwhelming number or amount
a church congregation guided by a pastor
an orderly crowd
(often followed by `of') a large number or amount or extent

flock (verb)	inundation (verb)
come together as in a cluster or flock
move as a crowd or in a group