droppings vs stool

droppings and stool both are nouns.

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

As nouns, stool is a hypernym of droppings; that is, stool is a word with a broader meaning than droppings:

Other hypernyms of droppings include BM, dejection, faecal matter, faeces, fecal matter, feces, ordure.

droppings (noun)	stool (noun)
fecal matter of animals	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

droppings (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