deluge vs flood out

deluge is a noun but flood out is not a noun.

Word	Noun	Adjective	Verb	Adverb
deluge	Yes	No	Yes	No
flood out	No	No	Yes	No

As verbs, deluge and flood out are synonyms defined as:

Other synonyms of deluge include overwhelm.

deluge (noun)	flood out (noun)
a heavy rain
the rising of a body of water and its overflowing onto normally dry land
an overwhelming number or amount

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