capital of Italy vs circus

capital of Italy and circus both are nouns.

Word	Noun	Adjective	Verb	Adverb
capital of Italy	Yes	No	No	No
circus	Yes	No	No	No

capital of Italy (noun)	circus (noun)
capital and largest city of Italy; on the Tiber; seat of the Roman Catholic Church; formerly the capital of the Roman Republic and the Roman Empire	a performance given by a traveling company of acrobats, clowns, and trained animals
	a frenetic disorganized (and often comic) disturbance suggestive of a large public entertainment
	an arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tent
	(antiquity) an open-air stadium for chariot races and gladiatorial games
	a travelling company of entertainers; including trained animals