rear end vs vulgarism

rear end and vulgarism both are nouns.

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

rear end (noun)	vulgarism (noun)
the fleshy part of the human body that you sit on	the quality of lacking taste and refinement
	an offensive or indecent word or phrase