nonparticipation vs non-engagement

nonparticipation and non-engagement both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonparticipation	Yes	No	No	No
non-engagement	Yes	No	No	No

As nouns, nonparticipation and non-engagement are synonyms defined as:

nonparticipation and non-engagement: withdrawing from the activities of a group

Other synonyms of nonparticipation include non-involvement.

nonparticipation (noun)	non-engagement (noun)
withdrawing from the activities of a group	withdrawing from the activities of a group