excrement vs pee

excrement and pee both are nouns.

Word	Noun	Adjective	Verb	Adverb
excrement	Yes	No	No	No
pee	Yes	No	Yes	No

As nouns, pee is a hyponym of excrement; that is, pee is a word with a more specific, narrower meaning than excrement:

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

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

excrement (verb)	pee (verb)
	eliminate urine