imminentness vs imminency

imminentness and imminency both are nouns.

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

As nouns, imminentness and imminency are synonyms defined as:

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

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

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