ageless vs unceasing

ageless and unceasing both are adjectives.

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

As adjectives, ageless and unceasing are synonyms defined as:

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

ageless (adjective)	unceasing (adjective)
continuing forever or indefinitely	uninterrupted in time and indefinitely long continuing
	continuing forever or indefinitely