unremitting vs incessant

unremitting and incessant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unremitting	No	Yes	No	No
incessant	No	Yes	No	No

As adjectives, unremitting and incessant are synonyms defined as:

unremitting and incessant: uninterrupted in time and indefinitely long continuing

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

unremitting (adjective)	incessant (adjective)
uninterrupted in time and indefinitely long continuing	uninterrupted in time and indefinitely long continuing