腓骨[hikotsu] fibula
腓返り[komuragaeri] cramp in the leg
腓腹筋[hifukukin] gastrocnemius muscle

腓腸筋[hichoukin] gastrocnemius muscle
腓腹[hifuku] calf muscle

せん状骨[senjoukotsu] scaphoid bone (in wrist near thumb)
遺骨[ikotsu] remains
化骨[kakotsu] ossification
会厭軟骨[eennankotsu] epiglottis
がい骨[gaikotsu] skeleton

雁骨[kariganebone] scapula
気骨[kikotsu] (moral) backbone
侠骨[kyoukotsu] chivalrous spirit
胸骨[kyoukotsu] breastbone
筋骨[kinkotsu] muscles (sinews) and bones