Argo Navis vs Argo

Argo Navis and Argo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Argo Navis	Yes	No	No	No
Argo	Yes	No	No	No

As nouns, Argo Navis and Argo are synonyms defined as:

Argo Navis and Argo: formerly a large constellation in the Southern Hemisphere between Canis Major and the Southern Cross; now divided into Carina and Pyxis and Puppis and Vela

Argo Navis (noun)	Argo (noun)
formerly a large constellation in the Southern Hemisphere between Canis Major and the Southern Cross; now divided into Carina and Pyxis and Puppis and Vela	formerly a large constellation in the Southern Hemisphere between Canis Major and the Southern Cross; now divided into Carina and Pyxis and Puppis and Vela