N3 - 回復かいふく
recovery (from illness), improvement, rehabilitation, restoration
N2 - 往復おうふく
(col) round trip, coming and going, return ticket
N1 - 復旧ふくきゅう
restoration, restitution, rehabilitation
N1 - 復活ふっかつ
revival (e.g. musical), restoration
N1 - 復興ふっこう
revival, renaissance, reconstruction