pretend vs behave

pretend is a noun but behave is not a noun.

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

pretend (noun)	behave (noun)
the enactment of a pretense

pretend (adjective)	behave (adjective)
imagined as in a play

pretend (verb)	behave (verb)
make believe with the intent to deceive	behave in a certain manner; show a certain behavior; conduct or comport oneself
represent fictitiously, as in a play, or pretend to be or act like	behave well or properly
put forward, of a guess, in spite of possible refutation
state insincerely
behave unnaturally or affectedly
put forward a claim and assert right or possession of