chalkstone vs urate

chalkstone and urate both are nouns.

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

As nouns, urate is a hypernym of chalkstone; that is, urate is a word with a broader meaning than chalkstone:

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

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