bullfrog

n type of large American frog with a loud croak 牛蛙（产於美洲）.

bulkhead, bulky, bull, bull's-eye, bull-headed, bull-necked, bull-terrier, bulldog, bulldog clip, bulldoze, bulldozer, bullet, bullet-headed, bullet-proof, bulletin, bulletin board, bullfight, bullfighter, bullfighting, bullfinch, bullhorn, bullion, bullish, bullock, bullring, bullshit, bully, bully-boy, bulrush, bulwark, bum, bumble, bumble-bee, bumbling, bumf (also bumph), bump, bumper, bumper-to-bumper, bumph, bumpily,