poeciliid vs molly

poeciliid and molly both are nouns.

Word	Noun	Adjective	Verb	Adverb
poeciliid	Yes	No	No	No
molly	Yes	No	No	No

As nouns, molly is a hyponym of poeciliid; that is, molly is a word with a more specific, narrower meaning than poeciliid:

poeciliid: small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control
molly: popular aquarium fish

Other hyponyms of poeciliid include Gambusia affinis, mosquitofish, platy, Platypoecilus maculatus, mollie.

poeciliid (noun)	molly (noun)
small usually brightly-colored viviparous surface-feeding fishes of fresh or brackish warm waters; often used in mosquito control	popular aquarium fish