fecal matter vs dejection

fecal matter and dejection both are nouns.

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

As nouns, fecal matter and dejection are synonyms defined as:

fecal matter and dejection: solid excretory product evacuated from the bowels

Other synonyms of fecal matter include BM, faecal matter, faeces, feces, ordure, stool.

fecal matter (noun)	dejection (noun)
solid excretory product evacuated from the bowels	a state of melancholy depression
	solid excretory product evacuated from the bowels