bloater vs herring

bloater and herring both are nouns.

Word	Noun	Adjective	Verb	Adverb
bloater	Yes	No	No	No
herring	Yes	No	No	No

As nouns, herring is a hypernym of bloater; that is, herring is a word with a broader meaning than bloater:

bloater: large fatty herring lightly salted and briefly smoked
herring: valuable flesh of fatty fish from shallow waters of northern Atlantic or Pacific; usually salted or pickled

bloater (noun)	herring (noun)
large fatty herring lightly salted and briefly smoked	commercially important food fish of northern waters of both Atlantic and Pacific
	valuable flesh of fatty fish from shallow waters of northern Atlantic or Pacific; usually salted or pickled