wetting vs immersion

wetting and immersion both are nouns.

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

As nouns, immersion is a hyponym of wetting; that is, immersion is a word with a more specific, narrower meaning than wetting:

wetting (noun)	immersion (noun)
the act of making something wet	a form of baptism in which part or all of a person's body is submerged
a euphemism for urination	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