submerging vs submerge

submerging is a noun but submerge is not a noun.

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

submerging (noun)	submerge (noun)
sinking until covered completely with water

submerging (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