statue vs sphinx

statue and sphinx both are nouns.

Word	Noun	Adjective	Verb	Adverb
statue	Yes	No	No	No
sphinx	Yes	No	No	No

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

statue: a sculpture representing a human or animal
sphinx: one of a number of large stone statues with the body of a lion and the head of a man that were built by the ancient Egyptians

Other hyponyms of statue include herm, nude, nude sculpture, nude statue, Olympian Zeus, term, terminal figure, terminus.

statue (noun)	sphinx (noun)
a sculpture representing a human or animal	one of a number of large stone statues with the body of a lion and the head of a man that were built by the ancient Egyptians
	an inscrutable person who keeps his thoughts and intentions secret