stool vs droppings

stool and droppings both are nouns.

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

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

Other hyponyms of stool include dog do, dog shit, dog turd, doggy do, crap, dirt, poop, shit, shite, turd, dung, muck, meconium, melaena, melena.

stool (noun)	droppings (noun)
a simple seat without a back or arms	fecal matter of animals
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

stool (verb)	droppings (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