flamefish vs flame fish

flamefish and flame fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
flamefish	Yes	No	No	No
flame fish	Yes	No	No	No

As nouns, flamefish and flame fish are synonyms defined as:

flamefish and flame fish: a cardinalfish found in tropical Atlantic coastal waters

Other synonyms of flamefish include Apogon maculatus.

flamefish (noun)	flame fish (noun)
a cardinalfish found in tropical Atlantic coastal waters	a cardinalfish found in tropical Atlantic coastal waters