cockchafer vs May beetle

cockchafer and May beetle both are nouns.

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

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

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

Other synonyms of cockchafer include May bug, Melolontha melolontha.

cockchafer (noun)	May beetle (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.