May bug vs cockchafer

May bug and cockchafer both are nouns.

Word	Noun	Adjective	Verb	Adverb
May bug	Yes	No	No	No
cockchafer	Yes	No	No	No

As nouns, May bug and cockchafer are synonyms defined as:

May bug and cockchafer: any of various large European beetles destructive to vegetation as both larvae and adult

Other synonyms of May bug include May beetle, Melolontha melolontha.

May bug (noun)	cockchafer (noun)
any of various large European beetles destructive to vegetation as both larvae and adult	any of various large European beetles destructive to vegetation as both larvae and adult
any of various large usually brown North American leaf-eating beetles common in late spring; the larvae feed on roots of grasses etc.