coprolith vs stercolith

coprolith and stercolith both are nouns.

Word	Noun	Adjective	Verb	Adverb
coprolith	Yes	No	No	No
stercolith	Yes	No	No	No

As nouns, coprolith and stercolith are synonyms defined as:

Other synonyms of coprolith include faecalith, fecalith.

coprolith (noun)	stercolith (noun)
a hard mass of fecal matter	a hard mass of fecal matter