As nouns the difference between cooper and yooper
is that cooper
is a craftsman who makes and repairs barrels and similar wooden vessels such as casks, buckets and tubs while yooper
As a verb cooper
is to make and repair barrels etc.
Other Comparisons: What's the difference?
A botanical plant name author abbreviation for botanist Daniel Cooper (~1817-1842).
Author query of the International Plant Names Index
(informal) a native or inhabitant of the (Upper Peninsula of Michigan).