faecal matter vs fecal matter

faecal matter and fecal matter both are nouns.

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

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

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

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

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