unceasing vs eternal

unceasing and eternal both are adjectives.

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

As adjectives, unceasing and eternal are synonyms defined as:

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

unceasing (adjective)	eternal (adjective)
uninterrupted in time and indefinitely long continuing	tiresomely long; seemingly without end
continuing forever or indefinitely	continuing forever or indefinitely