impact vs impinging

impact and impinging both are nouns.

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

As nouns, impinging is a hypernym of impact; that is, impinging is a word with a broader meaning than impact:

Other hypernyms of impact include contact, striking.

impact (noun)	impinging (noun)
influencing strongly	the physical coming together of two or more things
the violent interaction of individuals or groups entering into combat
the striking of one body against another
a forceful consequence; a strong effect

impact (verb)	impinging (verb)
have an effect upon
press or wedge together; pack together