crap vs BM

crap and BM both are nouns.

Word	Noun	Adjective	Verb	Adverb
crap	Yes	No	Yes	No
BM	Yes	No	No	No

As nouns, BM is a hypernym of crap; that is, BM is a word with a broader meaning than crap:

Other hypernyms of crap include dejection, faecal matter, faeces, fecal matter, feces, ordure, stool.

crap (noun)	BM (noun)
Obscene word for unacceptable behavior	solid excretory product evacuated from the bowels
obscene terms for feces

crap (verb)	BM (verb)
have a bowel movement