fluster vs behave

fluster is a noun but behave is not a noun.

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

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

fluster: be flustered; behave in a confused manner
behave: behave in a certain manner; show a certain behavior; conduct or comport oneself

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

fluster (noun)	behave (noun)
a disposition that is confused or nervous and upset

fluster (verb)	behave (verb)
cause to be nervous or upset	behave in a certain manner; show a certain behavior; conduct or comport oneself
be flustered; behave in a confused manner	behave well or properly