dirt vs fecal matter

dirt and fecal matter both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirt	Yes	Yes	No	No
fecal matter	Yes	No	No	No

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

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

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