deluge vs rain

deluge and rain both are nouns.

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

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

Other hypernyms of deluge include rainfall.

deluge (noun)	rain (noun)
a heavy rain	anything happening rapidly or in quick successive
the rising of a body of water and its overflowing onto normally dry land	water falling in drops from vapor condensed in the atmosphere
an overwhelming number or amount	drops of fresh water that fall as precipitation from clouds

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