renal calculus vs urinary calculus

renal calculus and urinary calculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
renal calculus	Yes	No	No	No
urinary calculus	Yes	No	No	No

As nouns, renal calculus and urinary calculus are synonyms defined as:

Other synonyms of renal calculus include kidney stone, nephrolith.

renal calculus (noun)	urinary calculus (noun)
a calculus formed in the kidney	a calculus formed in the kidney