engrossment vs absorption

engrossment and absorption both are nouns.

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

As nouns, engrossment and absorption are synonyms defined as:

engrossment and absorption: the mental state of being preoccupied by something

Other synonyms of engrossment include preoccupancy, preoccupation.

As nouns, engrossment and absorption are synonyms defined as:

Other synonyms of engrossment include concentration, immersion.

engrossment (noun)	absorption (noun)
the quality of being intent and concentrated	the mental state of being preoccupied by something
the mental state of being preoccupied by something	complete attention; intense mental effort
complete attention; intense mental effort	(chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid
	the process of absorbing nutrients into the body after digestion
	(physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium
	the social process of absorbing one cultural group into harmony with another