fecal matter vs faecal matter

fecal matter and faecal matter both are nouns.

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

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

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

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

fecal matter (noun)	faecal matter (noun)
solid excretory product evacuated from the bowels	solid excretory product evacuated from the bowels