continuousness vs ceaselessness

continuousness and ceaselessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
continuousness	Yes	No	No	No
ceaselessness	Yes	No	No	No

As nouns, continuousness and ceaselessness are synonyms defined as:

continuousness and ceaselessness: the quality of something that continues without end or interruption

Other synonyms of continuousness include incessancy, incessantness.

continuousness (noun)	ceaselessness (noun)
the quality of something that continues without end or interruption	the quality of something that continues without end or interruption