Scorpio vs Scorpius

Scorpio and Scorpius both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scorpio	Yes	No	No	No
Scorpius	Yes	No	No	No

As nouns, Scorpio and Scorpius are synonyms defined as:

Scorpio and Scorpius: a large zodiacal constellation between Libra and Sagittarius

Scorpio (noun)	Scorpius (noun)
the eighth sign of the zodiac; the sun is in this sign from about October 23 to November 21	a large zodiacal constellation between Libra and Sagittarius
a large zodiacal constellation between Libra and Sagittarius
(astrology) a person who is born while the sun is in Scorpio