deluge vs rainfall

deluge and rainfall both are nouns.

Word	Noun	Adjective	Verb	Adverb
deluge	Yes	No	Yes	No
rainfall	Yes	No	No	No

As nouns, rainfall is a hypernym of deluge; that is, rainfall is a word with a broader meaning than deluge:

Other hypernyms of deluge include rain.

deluge (noun)	rainfall (noun)
a heavy rain	water falling in drops from vapor condensed in the atmosphere
the rising of a body of water and its overflowing onto normally dry land
an overwhelming number or amount

deluge (verb)	rainfall (verb)
fill or cover completely, usually with water
charge someone with too many tasks
fill quickly beyond capacity; as with a liquid