帰還【きかん】
return (home), repatriation, feedback (in an electronic circuit, biological system, etc.)
返還【へんかん】
return, restoration
還元【かんげん】
restoration, return, reduction, resolution, deoxidization, deoxidation
償還【しょうかん】
repayment, redemption, amortization, amortisation
還付【かんぷ】
return, restoration, refund, (duty) drawback
送還【そうかん】
sending home, repatriation, deportation
奪還【だっかん】
recapture, retaking, recovery, taking back
還暦【かんれき】
kanreki, one's 60th birthday (or 61st in the traditional age reckoning system) when one has lived through a full sexagenary cycle
還流【かんりゅう】
return current, convection, reflux
生還【せいかん】
returning alive, surviving, reaching the home plate
往還【おうかん】
traffic, coming and going, highway