swordtail vs helleri

swordtail and helleri both are nouns.

Word	Noun	Adjective	Verb	Adverb
swordtail	Yes	No	No	No
helleri	Yes	No	No	No

As nouns, swordtail and helleri are synonyms defined as:

swordtail and helleri: freshwater fish of Central America having a long swordlike tail; popular aquarium fish

Other synonyms of swordtail include topminnow, Xyphophorus helleri.

swordtail (noun)	helleri (noun)
freshwater fish of Central America having a long swordlike tail; popular aquarium fish	freshwater fish of Central America having a long swordlike tail; popular aquarium fish