Sirius vs Sothis

Sirius and Sothis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sirius	Yes	No	No	No
Sothis	Yes	No	No	No

As nouns, Sirius and Sothis are synonyms defined as:

Other synonyms of Sirius include Canicula, Dog Star.

Sirius (noun)	Sothis (noun)
the brightest star in the sky; in Canis Major	the brightest star in the sky; in Canis Major