悪習[akushuu] bad habit
悪習慣[akushuukan] bad habit
演習[enshuu] practice
演習問題[enshuumondai] practice problem
演奏練習[ensourenshuu] musical rehearsal

学習[gakushuu] study
学習者[gakushuusha] learner
学習塾[gakushuujuku] private night-school
学習用[gakushuuyou] tutorial
学習用ヘルプ[gakushuuyouherupu] tutorial help

遠近[enkin] distance
遠近法[enkinhou] perspective
仮性近視[kaseikinshi] false shortsightedness
真近[majika] proximity
近い[chikai] near

近い内に[chikaiuchini] before long
近い将来[chikaishourai] near future
近く[chikaku] near
近付く[chikazuku] to approach
近縁[kinen] close relation (association)