sergeant fish vs cobia

sergeant fish and cobia both are nouns.

Word	Noun	Adjective	Verb	Adverb
sergeant fish	Yes	No	No	No
cobia	Yes	No	No	No

As nouns, sergeant fish and cobia are synonyms defined as:

sergeant fish and cobia: large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters

Other synonyms of sergeant fish include Rachycentron canadum.

sergeant fish (noun)	cobia (noun)
large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters	large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters