posterior vs excretory product

posterior and excretory product both are nouns.

Word	Noun	Adjective	Verb	Adverb
posterior	Yes	Yes	No	No
excretory product	Yes	No	No	No

posterior (noun)	excretory product (noun)
the fleshy part of the human body that you sit on	waste matter (as urine or sweat but especially feces) discharged from the body
a tooth situated at the back of the mouth

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