eelpout vs blennioid

eelpout and blennioid both are nouns.

Word	Noun	Adjective	Verb	Adverb
eelpout	Yes	No	No	No
blennioid	Yes	No	No	No

As nouns, blennioid is a hypernym of eelpout; that is, blennioid is a word with a broader meaning than eelpout:

eelpout: marine eellike mostly bottom-dwelling fishes of northern seas
blennioid: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins

Other hypernyms of eelpout include blennioid fish.

eelpout (noun)	blennioid (noun)
marine eellike mostly bottom-dwelling fishes of northern seas	elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins
elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth