never-ending vs unremitting

never-ending and unremitting both are adjectives.

Word	Noun	Adjective	Verb	Adverb
never-ending	No	Yes	No	No
unremitting	No	Yes	No	No

As adjectives, never-ending and unremitting are synonyms defined as:

never-ending and unremitting: uninterrupted in time and indefinitely long continuing

Other synonyms of never-ending include ceaseless, constant, incessant, perpetual, unceasing.

never-ending (adjective)	unremitting (adjective)
uninterrupted in time and indefinitely long continuing	uninterrupted in time and indefinitely long continuing