亢奮[koufun] excitement
興奮剤[koufunzai] stimulant
獅子奮迅[shishifunjin] being irresistible
奮い立つ[furuitatsu] to cheer up
奮う[furuu] to muster (e.g. one's courage)

奮って[furutte] energetically
奮起[funki] stirring
奮迅[funjin] impetuous dash forward
奮戦[funsen] hard fighting
奮闘[funtou] hard struggle

一興[ikkyou] amusement
感興[kankyou] interest
興がる[kyougaru] to be amused or interested in
興じる[kyoujiru] to amuse oneself
興す[okosu] to revive

興ずる[kyouzuru] to amuse oneself
興る[okoru] to rise
興亜[koua] Asia development
興起[kouki] rise
興業[kougyou] industrial enterprise