Sirius vs Canicula

Sirius and Canicula both are nouns.

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

As nouns, Sirius and Canicula are synonyms defined as:

Other synonyms of Sirius include Dog Star, Sothis.

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