rottenstone vs tripoli

rottenstone and tripoli both are nouns.

Word	Noun	Adjective	Verb	Adverb
rottenstone	Yes	No	No	No
tripoli	Yes	No	No	No

As nouns, rottenstone and tripoli are synonyms defined as:

rottenstone and tripoli: a weathered and decomposed siliceous limestone; in powdered form it is used in polishing

rottenstone (noun)	tripoli (noun)
a weathered and decomposed siliceous limestone; in powdered form it is used in polishing	a weathered and decomposed siliceous limestone; in powdered form it is used in polishing