immutable vs changeless

immutable and changeless both are adjectives.

Word	Noun	Adjective	Verb	Adverb
immutable	No	Yes	No	No
changeless	No	Yes	No	No

As adjectives, immutable and changeless are synonyms defined as:

immutable and changeless: not subject or susceptible to change or variation in form or quality or nature

immutable (adjective)	changeless (adjective)
not subject or susceptible to change or variation in form or quality or nature	not subject or susceptible to change or variation in form or quality or nature
constant and unchanging	unvarying in nature
	remaining the same for indefinitely long times