imminentness vs impendency

imminentness and impendency both are nouns.

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

As nouns, imminentness and impendency are synonyms defined as:

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

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

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