limestone vs tripoli

limestone and tripoli both are nouns.

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

As nouns, tripoli is a hyponym of limestone; that is, tripoli is a word with a more specific, narrower meaning than limestone:

limestone: a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
tripoli: a weathered and decomposed siliceous limestone; in powdered form it is used in polishing

Other hyponyms of limestone include rottenstone.

limestone (noun)	tripoli (noun)
a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals	a weathered and decomposed siliceous limestone; in powdered form it is used in polishing