piss vs stool

piss and stool both are nouns.

Word	Noun	Adjective	Verb	Adverb
piss	Yes	No	Yes	No
stool	Yes	No	Yes	No

piss (noun)	stool (noun)
informal terms for urination	a simple seat without a back or arms
liquid excretory product	a plumbing fixture for defecation and urination
	(forestry) the stump of a tree that has been felled or headed for the production of saplings
	solid excretory product evacuated from the bowels

piss (verb)	stool (verb)
eliminate urine	have a bowel movement
	grow shoots in the form of stools or tillers
	react to a decoy, of wildfowl
	lure with a stool, as of wild fowl