充填[juuten] fill (up)
装填[souten] charge
填める[uzumeru] to cover
填める[hameru] to insert
填め込む[hamekomu] to inlay

填る[hamaru] to fit
補填[hoten] compensating
填補[tenpo] supplementation
填り役[hamariyaku] well-suited role
填隙[tengeki] caulking

パイプ役[paipuyaku] mediator
悪役[akuyaku] villain
一役[ichiyaku] an office
一役[hitoyaku] role (which someone or something plays in a given situation)
下役[shitayaku] underling

仮役[kariyaku] temporary post
加役[kayaku] temporary extra work
監査役[kansayaku] auditor
顔役[kaoyaku] influential man
区役所[kuyakusho] ward office