may fish vs mayfish

may fish and mayfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
may fish	Yes	No	No	No
mayfish	Yes	No	No	No

As nouns, may fish and mayfish are synonyms defined as:

may fish and mayfish: black-barred fish of bays and coastal marshes of the Atlantic and Gulf Coast of the United States

Other synonyms of may fish include Fundulus majalis, striped killifish.

may fish (noun)	mayfish (noun)
black-barred fish of bays and coastal marshes of the Atlantic and Gulf Coast of the United States	black-barred fish of bays and coastal marshes of the Atlantic and Gulf Coast of the United States