changelessness vs unchangingness

changelessness and unchangingness both are nouns.

Word	Noun	Adjective	Verb	Adverb
changelessness	Yes	No	No	No
unchangingness	Yes	No	No	No

As nouns, changelessness and unchangingness are synonyms defined as:

changelessness and unchangingness: the quality of being unchangeable; having a marked tendency to remain unchanged

Other synonyms of changelessness include unchangeability, unchangeableness.

changelessness (noun)	unchangingness (noun)
the quality of being unchangeable; having a marked tendency to remain unchanged	the quality of being unchangeable; having a marked tendency to remain unchanged
the property of remaining unchanged