tail end vs excretory product

tail end and excretory product both are nouns.

Word	Noun	Adjective	Verb	Adverb
tail end	Yes	No	No	No
excretory product	Yes	No	No	No

tail end (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
any projection that resembles the tail of an animal
the time of the last part of something