Twins vs Gemini the Twins

Twins and Gemini the Twins both are nouns.

Word	Noun	Adjective	Verb	Adverb
Twins	Yes	No	No	No
Gemini the Twins	Yes	No	No	No

As nouns, Twins and Gemini the Twins are synonyms defined as:

Twins and Gemini the Twins: the third sign of the zodiac; the sun is in this sign from about May 21 to June 20

Other synonyms of Twins include Gemini.

Twins (noun)	Gemini the Twins (noun)
the third sign of the zodiac; the sun is in this sign from about May 21 to June 20	the third sign of the zodiac; the sun is in this sign from about May 21 to June 20