rear end vs obscenity

rear end and obscenity both are nouns.

Word	Noun	Adjective	Verb	Adverb
rear end	Yes	No	No	No
obscenity	Yes	No	No	No

rear end (noun)	obscenity (noun)
the fleshy part of the human body that you sit on	an obscene act
	the trait of behaving in an obscene manner
	an offensive or indecent word or phrase