piss vs excretory product

piss and excretory product both are nouns.

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

As nouns, excretory product is a hypernym of piss; that is, excretory product is a word with a broader meaning than piss:

piss: liquid excretory product
excretory product: waste matter (as urine or sweat but especially feces) discharged from the body

Other hypernyms of piss include body waste, excrement, excreta, excretion.

piss (noun)	excretory product (noun)
informal terms for urination	waste matter (as urine or sweat but especially feces) discharged from the body
liquid excretory product

piss (verb)	excretory product (verb)
eliminate urine