excretory product vs BM

excretory product and BM both are nouns.

Word	Noun	Adjective	Verb	Adverb
excretory product	Yes	No	No	No
BM	Yes	No	No	No

As nouns, BM is a hyponym of excretory product; that is, BM is a word with a more specific, narrower meaning than excretory product:

excretory product: waste matter (as urine or sweat but especially feces) discharged from the body
BM: solid excretory product evacuated from the bowels

excretory product (noun)	BM (noun)
waste matter (as urine or sweat but especially feces) discharged from the body	solid excretory product evacuated from the bowels