tophus vs urate

tophus and urate both are nouns.

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

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

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

tophus (noun)	urate (noun)
an incrustation that forms on the teeth and gums	a salt of uric acid
a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout