inundation vs raft

inundation and raft both are nouns.

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

As nouns, raft is a hypernym of inundation; that is, raft is a word with a broader meaning than inundation:

inundation (noun)	raft (noun)
the rising of a body of water and its overflowing onto normally dry land	a flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers
an overwhelming number or amount	a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete
	(often followed by `of') a large number or amount or extent