immersion vs engrossment

immersion and engrossment both are nouns.

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

As nouns, immersion and engrossment are synonyms defined as:

Other synonyms of immersion include absorption, concentration.

immersion (noun)	engrossment (noun)
a form of baptism in which part or all of a person's body is submerged	the quality of being intent and concentrated
the act of wetting something by submerging it	the mental state of being preoccupied by something
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