submersion vs submerge

submersion is a noun but submerge is not a noun.

Word	Noun	Adjective	Verb	Adverb
submersion	Yes	No	No	No
submerge	No	No	Yes	No

submersion (noun)	submerge (noun)
the act of wetting something by submerging it
sinking until covered completely with water

submersion (verb)	submerge (verb)
	fill or cover completely, usually with water
	cover completely or make imperceptible
	put under water
	sink below the surface; go under or as if under water