piffle vs meaninglessness

piffle and meaninglessness both are nouns.

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

As nouns, meaninglessness is a hypernym of piffle; that is, meaninglessness is a word with a broader meaning than piffle:

Other hypernyms of piffle include bunk, hokum, nonsense, nonsensicality.

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

piffle (verb)	meaninglessness (verb)
act in a trivial or ineffective way
speak (about unimportant matters) rapidly and incessantly