御終い[oshimai] the end
テキスト終結[tekisutoshuuketsu] end of text
為し終える[nashioeru] to accomplish
為し終わる[nashiowaru] to finish
異常終了[ijoushuuryou] abnormal termination (e.g. of a program)

一部始終[ichibushijuu] full particulars
引用終わり[inyouowari] end of quote
最終[saishuu] last
最終回[saishuukai] last time
最終段階[saishuudankai] final stage

逸速く[ichihayaku] promptly
音速[onsoku] speed of sound
加速[kasoku] acceleration
加速運動[kasokuundou] accelerated motion
加速度[kasokudo] acceleration

快速[kaisoku] high speed
快速電車[kaisokudensha] high-speed train
角速度[kakusokudo] angular velocity
急速[kyuusoku] rapid (e.g. progress)
減速[gensoku] deceleration