frost fish vs hairtail

frost fish and hairtail both are nouns.

Word	Noun	Adjective	Verb	Adverb
frost fish	Yes	No	No	No
hairtail	Yes	No	No	No

As nouns, frost fish and hairtail are synonyms defined as:

frost fish and hairtail: long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel

Other synonyms of frost fish include cutlassfish.

frost fish (noun)	hairtail (noun)
long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel	long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel