imperishableness vs imperishingness

imperishableness and imperishingness both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperishableness	Yes	No	No	No
imperishingness	Yes	No	No	No

As nouns, imperishableness and imperishingness are synonyms defined as:

imperishableness and imperishingness: the property of being resistant to decay

Other synonyms of imperishableness include imperishability.

imperishableness (noun)	imperishingness (noun)
the property of being resistant to decay	the property of being resistant to decay