dirt vs BM

dirt and BM both are nouns.

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

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

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

dirt (noun)	BM (noun)
disgraceful gossip about the private lives of other people	solid excretory product evacuated from the bowels
anything regarded as making something unclean
the part of the earth's surface consisting of humus and disintegrated rock
obscene terms for feces

dirt (adjective)	BM (adjective)
(of roads) not leveled or drained; unsuitable for all year travel