fecal matter vs crap

fecal matter and crap both are nouns.

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

As nouns, crap is a hyponym of fecal matter; that is, crap is a word with a more specific, narrower meaning than fecal matter:

Other hyponyms of fecal matter include dog do, dog shit, dog turd, doggy do, dirt, poop, shit, shite, turd, droppings, dung, muck, meconium, melaena, melena.

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

fecal matter (verb)	crap (verb)
	have a bowel movement