vulgarism vs posterior

vulgarism and posterior both are nouns.

Word	Noun	Adjective	Verb	Adverb
vulgarism	Yes	No	No	No
posterior	Yes	Yes	No	No

vulgarism (noun)	posterior (noun)
the quality of lacking taste and refinement	the fleshy part of the human body that you sit on
an offensive or indecent word or phrase	a tooth situated at the back of the mouth

vulgarism (adjective)	posterior (adjective)
	located at or near or behind a part or near the end of a structure
	coming at a subsequent time or stage