immersion vs immerse

immersion is a noun but immerse is not a noun.

Word	Noun	Adjective	Verb	Adverb
immersion	Yes	No	No	No
immerse	No	No	Yes	No

immersion (noun)	immerse (noun)
a form of baptism in which part or all of a person's body is submerged
the act of wetting something by submerging it
complete attention; intense mental effort
sinking until covered completely with water
(astronomy) the disappearance of a celestial body prior to an eclipse

immersion (verb)	immerse (verb)
	devote (oneself) fully to
	cause to be immersed
	thrust or throw into
	enclose or envelop completely, as if by swallowing