changelessness vs unchangeableness

changelessness and unchangeableness both are nouns.

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

As nouns, changelessness and unchangeableness are synonyms defined as:

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

Other synonyms of changelessness include unchangeability, unchangingness.

changelessness (noun)	unchangeableness (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