偉功[ikou] great deed
遺功[ikou] works following the deceased
気功[kikou] breathing exercise
九仞の功[kyuujinnokou] spectacular success
勲功[kunkou] merits

軍功[gunkou] meritorious war service
蛍雪の功[keisetsunokou] the fruit of diligent study
功業[kougyou] exploit
功罪[kouzai] both good and bad
功績[kouseki] achievements

演奏練習[ensourenshuu] musical rehearsal
教練[kyouren] drill
訓練[kunren] practice
軍事教練[gunjikyouren] military training
軍事訓練[gunjikunren] military exercise

試練[shiren] test
手練手管[terentekuda] wiles
修練者[shuurensha] (Catholic) neophyte
熟練[jukuren] skill
洗練[senren] polish