eonian vs unceasing

eonian and unceasing both are adjectives.

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

As adjectives, eonian and unceasing are synonyms defined as:

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

eonian (adjective)	unceasing (adjective)
of or relating to a geological eon (longer than an era)	uninterrupted in time and indefinitely long continuing
continuing forever or indefinitely	continuing forever or indefinitely