加特力[katorikku] Catholic (church)
キー入力[kiinyuuryoku] key (input)
苦力[kuurii] coolie
握力[akuryoku] grip (of hand)
圧力[atsuryoku] stress

圧力計[atsuryokukei] manometer
圧力団体[atsuryokudantai] pressure group
圧力調整器[atsuryokuchouseiki] pressure regulator
圧力鍋[atsuryokunabe] pressure cooker
圧力波[atsuryokuha] pressure wave

努める[tsutomeru] to endeavor (endeavour)
努めて[tsutomete] as much as possible
努力[doryoku] great effort
努力家[doryokuka] hard worker
努む[rikimu] to strain

極力努める[kyokuryokutsutomeru] to do one's best
努力も空しく[doryokumomunashiku] after efforts in vain
努力賞[doryokushou] prize awarded for a person's effort
実らなかった努力[minoranakattadoryoku] fruitless (resultless) efforts
奮励努力[funreidoryoku] making strenuous efforts

空オケ[karaoke] karaoke (singing to taped accompaniment)
ベクトル空間[bekutorukuukan] vector space
茜さす空[akanesasusora] glowing sky
圧搾空気[assakukuuki] compressed air
圧縮空気[asshukukuuki] compressed air

位相空間[isoukuukan] phase space (physics)
宇宙空間[uchuukuukan] outer space
雨空[amazora] rainy sky
英国航空[eikokukoukuu] British Airways
仮想空間[kasoukuukan] virtual space (e.g. in computer graphics)