backside vs obscenity

backside and obscenity both are nouns.

Word	Noun	Adjective	Verb	Adverb
backside	Yes	No	No	No
obscenity	Yes	No	No	No

backside (noun)	obscenity (noun)
the fleshy part of the human body that you sit on	an obscene act
the side of an object that is opposite its front	the trait of behaving in an obscene manner
	an offensive or indecent word or phrase