killifish vs cyprinodont

killifish and cyprinodont both are nouns.

Word	Noun	Adjective	Verb	Adverb
killifish	Yes	No	No	No
cyprinodont	Yes	No	No	No

As nouns, cyprinodont is a hypernym of killifish; that is, cyprinodont is a word with a broader meaning than killifish:

killifish: small mostly marine warm-water carp-like schooling fishes; used as bait or aquarium fishes or in mosquito control
cyprinodont: any member of the family Cyprinodontidae

killifish (noun)	cyprinodont (noun)
small mostly marine warm-water carp-like schooling fishes; used as bait or aquarium fishes or in mosquito control	any member of the family Cyprinodontidae