unending vs ageless

unending and ageless both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unending	No	Yes	No	No
ageless	No	Yes	No	No

As adjectives, unending and ageless are synonyms defined as:

Other synonyms of unending include aeonian, eonian, eternal, everlasting, perpetual, unceasing.

unending (adjective)	ageless (adjective)
continuing forever or indefinitely	continuing forever or indefinitely