beluga vs Acipenser huso

beluga and Acipenser huso both are nouns.

Word	Noun	Adjective	Verb	Adverb
beluga	Yes	No	No	No
Acipenser huso	Yes	No	No	No

As nouns, beluga and Acipenser huso are synonyms defined as:

beluga and Acipenser huso: valuable source of caviar and isinglass; found in Black and Caspian seas

Other synonyms of beluga include hausen, white sturgeon.

beluga (noun)	Acipenser huso (noun)
valuable source of caviar and isinglass; found in Black and Caspian seas	valuable source of caviar and isinglass; found in Black and Caspian seas
small northern whale that is white when adult