As nouns the difference between molly and cooper
is that molly
is (north america) the crystalline or powdered form of mdma while cooper
is a craftsman who makes and repairs barrels and similar wooden vessels such as casks, buckets and tubs.
As a proper noun molly
As a verb cooper is
to make and repair barrels etc.
A woman or girl, especially of low status.
(slang) An effeminate male, a male homosexual.
(slang) Pure MDMA powder.
A fish of the genus Poecilia .
A female cat; a she-cat.
A molly bolt.
A botanical plant name author abbreviation for botanist Daniel Cooper (~1817-1842).
Author query of the International Plant Names Index