螺子回し[nejimawashi] screwdriver
雌螺子[meneji] female screw
駄法螺[dabora] big talk
二重螺旋[nijuurasen] double helix (structure of DNA)
螺子山[nejiyama] screw thread

螺旋[neji] screw
螺旋[rasen] spiral
蠑螺[sazae] turban shell (any mollusc of the family Turbinidae, esp. the horned turban, Turbo cornutus)
吹螺[horagai] conch (Charonia tritonis)
細螺[kisago] periwinkle

塩辛[shiokara] salted fish (entrails)
辛子[karashi] mustard
香辛料[koushinryou] spices
辛気[shinki] mentality
辛い[karai] spicy

辛い[tsurai] painful
辛うじて[karoujite] barely
辛く当たる[tsurakuataru] to treat badly
辛苦[shinku] hardship
辛酸[shinsan] hardships