piffle vs behave

piffle is a noun but behave is not a noun.

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

As verbs, behave is a hypernym of piffle; that is, behave is a word with a broader meaning than piffle:

piffle: act in a trivial or ineffective way
behave: behave in a certain manner; show a certain behavior; conduct or comport oneself

Other hypernyms of piffle include acquit, act, bear, carry, comport, conduct, deport, do.

piffle (noun)	behave (noun)
trivial nonsense

piffle (verb)	behave (verb)
act in a trivial or ineffective way	behave in a certain manner; show a certain behavior; conduct or comport oneself
speak (about unimportant matters) rapidly and incessantly	behave well or properly