impinging vs engagement

impinging and engagement both are nouns.

Word	Noun	Adjective	Verb	Adverb
impinging	Yes	No	No	No
engagement	Yes	No	No	No

As nouns, engagement is a hyponym of impinging; that is, engagement is a word with a more specific, narrower meaning than impinging:

Other hyponyms of impinging include collision, hit, interlocking, mesh, meshing, flick, impact, touch, touching.

impinging (noun)	engagement (noun)
the physical coming together of two or more things	the act of sharing in the activities of a group
	a hostile meeting of opposing military forces in the course of a war
	the act of giving someone a job
	employment for performers or performing groups that lasts for a limited period of time
	a mutual promise to marry
	contact by fitting together
	a meeting arranged in advance