urate vs chalkstone

urate and chalkstone both are nouns.

Word	Noun	Adjective	Verb	Adverb
urate	Yes	No	No	No
chalkstone	Yes	No	No	No

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

urate: a salt of uric acid
chalkstone: a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout

Other hyponyms of urate include tophus.

urate (noun)	chalkstone (noun)
a salt of uric acid	a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout