razor fish vs razor-fish

razor fish and razor-fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
razor fish	Yes	No	No	No
razor-fish	Yes	No	No	No

As nouns, razor fish and razor-fish are synonyms defined as:

razor fish and razor-fish: any of several small wrasses with compressed sharp-edged heads of the West Indies and Mediterranean

razor fish (noun)	razor-fish (noun)
any of several small wrasses with compressed sharp-edged heads of the West Indies and Mediterranean	any of several small wrasses with compressed sharp-edged heads of the West Indies and Mediterranean