meaninglessness vs nonsense

meaninglessness and nonsense both are nouns.

Word	Noun	Adjective	Verb	Adverb
meaninglessness	Yes	No	No	No
nonsense	Yes	Yes	No	No

As nouns, meaninglessness and nonsense are synonyms defined as:

Other synonyms of meaninglessness include bunk, hokum, nonsensicality.

meaninglessness (noun)	nonsense (noun)
the quality of having no value or significance	ornamental objects of no great value
a message that seems to convey no meaning	a message that seems to convey no meaning

meaninglessness (adjective)	nonsense (adjective)
	having no intelligible meaning