submersion vs immersion

submersion and immersion both are nouns.

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

As nouns, submersion and immersion are synonyms defined as:

Other synonyms of submersion include dousing, ducking.

As nouns, submersion and immersion are synonyms defined as:

Other synonyms of submersion include submergence, submerging.

submersion (noun)	immersion (noun)
the act of wetting something by submerging it	a form of baptism in which part or all of a person's body is submerged
sinking until covered completely with water	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