pikeblenny vs blennioid

pikeblenny and blennioid both are nouns.

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

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

pikeblenny: tropical American fishes; males are aggressively defensive of their territory
blennioid: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins

Other hypernyms of pikeblenny include blennioid fish.

pikeblenny (noun)	blennioid (noun)
tropical American fishes; males are aggressively defensive of their territory	elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins