punch-ball

n (US punching ball) inflated or stuffed leather ball held on a stand or hung from above and punched for exercise or training, esp by boxers （练习拳击用的）梨球, 吊球.

pulp, pulpit, pulpy, pulsar, pulsate, pulsation, pulse, pulverization, pulverisation, pulverize, pulverize, pulverise, puma, pumice, pummel (also pommel), pummelling, pump, pump-room, pumpernickel, pumpkin, pun, Punch, punch-bowl, punch-drunk, punch-line, punch-up, punchline, punchy, punctilio, punctilious, punctiliously, punctiliousness, punctual, punctuality, punctually, punctuate, punctuation, punctuation mark, puncture, punctured, pundit, pungency,