雨子[amago] land-locked variety of red-spotted masu trout (Oncorhynchus masou ishikawae)
御菓子[okashi] confections
お子さん[okosan] (someone else's) child
お子様[okosama] child (someone else's)
山梔子[kuchinashi] Cape jasmine (Gardenia jasminoides)

させ子[saseko] whore
梃子摺る[tekozuru] to have much trouble
螺子回し[nejimawashi] screwdriver
硝子[garasu] glass
獅子女[sufinkusu] sphinx

鍵を掛ける[kagiwokakeru] to lock
鍵穴[kagiana] keyhole
鍵盤[kenban] keyboard (e.g. piano, computer)
黒鍵[kokken] black keys
打鍵[daken] keystroke

合鍵[aikagi] duplicate key
鍵っ子[kagikko] latchkey child
鍵束[kagitaba] bunch of keys
関鍵[kanken] locking doors