toilet seat vs stool

toilet seat and stool both are nouns.

Word	Noun	Adjective	Verb	Adverb
toilet seat	Yes	No	No	No
stool	Yes	No	Yes	No

toilet seat (noun)	stool (noun)
the hinged seat on a toilet	a simple seat without a back or arms
	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

toilet seat (verb)	stool (verb)
	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