海の幸[uminosachi] seafood
幸い[saiwai] happiness
幸甚[koujin] pleased
幸福[koufuku] happiness
山の幸[yamanosachi] food of the mountains (wild game, mountain vegetables, mushrooms, etc.)

幸せ者[shiawasemono] fortunate person
多幸[takou] great happiness
不幸[fukou] unhappiness
幸運[kouun] good luck

アルファ線[arufasen] alpha rays
エックス線[ekkususen] X-ray
サイン曲線[sainkyokusen] sinusoid
スピード線[supiidosen] speed lines
緯線[isen] parallel

一次線輪[ichijisenrin] primary coil
一線[issen] line
一直線[icchokusen] straight line
一番線[ichibansen] track no. 1
一塁線[ichiruisen] first-base line

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