incessant vs unremitting

incessant and unremitting both are adjectives.

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

As adjectives, incessant and unremitting are synonyms defined as:

incessant and unremitting: uninterrupted in time and indefinitely long continuing

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

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