ceaselessness vs continuousness

ceaselessness and continuousness both are nouns.

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

As nouns, ceaselessness and continuousness are synonyms defined as:

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

Other synonyms of ceaselessness include incessancy, incessantness.

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