engrossment vs immersion

engrossment and immersion both are nouns.

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

As nouns, engrossment and immersion are synonyms defined as:

Other synonyms of engrossment include absorption, concentration.

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