impendency vs imminence

impendency and imminence both are nouns.

Word	Noun	Adjective	Verb	Adverb
impendency	Yes	No	No	No
imminence	Yes	No	No	No

As nouns, impendency and imminence are synonyms defined as:

impendency and imminence: the state of being imminent and liable to happen soon

Other synonyms of impendency include forthcomingness, imminency, imminentness, impendence.

impendency (noun)	imminence (noun)
the state of being imminent and liable to happen soon	the state of being imminent and liable to happen soon