live-bearer vs poeciliid fish

live-bearer and poeciliid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
live-bearer	Yes	No	No	No
poeciliid fish	Yes	No	No	No

As nouns, live-bearer and poeciliid fish are synonyms defined as:

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

Other synonyms of live-bearer include poeciliid, topminnow.

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