嚼む[kamu] to bite
咀嚼[soshaku] chewing
咀嚼筋[soshakukin] muscle of mastication

咀嚼運動[soshakuundou] mastication
嚼ます[kamasu] to force something into someone's mouth (i.e. a gag)
咀嚼力[soshakuryoku] chewing power

緩衝[kanshou] buffered
緩衝器[kanshouki] shock absorber
緩衝地帯[kanshouchitai] buffer zone
刺衝[shishou] stabbing
衝撃[shougeki] shock

衝撃波[shougekiha] shock wave
衝動[shoudou] impulse
衝動行為[shoudoukoui] shock action
衝動買い[shoudougai] impulsive buying
衝突[shoutotsu] collision