white sturgeon vs beluga

white sturgeon and beluga both are nouns.

Word	Noun	Adjective	Verb	Adverb
white sturgeon	Yes	No	No	No
beluga	Yes	No	No	No

As nouns, white sturgeon and beluga are synonyms defined as:

white sturgeon and beluga: valuable source of caviar and isinglass; found in Black and Caspian seas

Other synonyms of white sturgeon include Acipenser huso, hausen.

white sturgeon (noun)	beluga (noun)
food and game fish of marine and fresh waters of northwestern coast of North America	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