stercolith vs coprolith

stercolith and coprolith both are nouns.

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

As nouns, stercolith and coprolith are synonyms defined as:

Other synonyms of stercolith include faecalith, fecalith.

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