buckwheat

n [U] dark seeds of grain used for feeding horses and poultry 荞麦.

Bthu (also Btu), bubble, bubble and squeak, bubble bath, bubble gum, bubbly, bubonic plague, buccaneer, buck, buck-tooth, bucked, bucket, bucket seat, bucket-shop, buckeye, buckle, buckram, buckshee, buckshot, buckskin, buckwheat flour, bucolic, bucolics, bud, Buddha, Buddhism, Buddhist, budding, buddy, budge, budgerigar, budget, budget account, budgetary, budgie, buff, buffalo, buffer, buffet, buffet car,