incessant vs ceaseless

incessant and ceaseless both are adjectives.

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

As adjectives, incessant and ceaseless are synonyms defined as:

incessant and ceaseless: uninterrupted in time and indefinitely long continuing

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

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