continuousness vs incessantness

continuousness and incessantness both are nouns.

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

As nouns, continuousness and incessantness are synonyms defined as:

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

Other synonyms of continuousness include ceaselessness, incessancy.

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