eigengenes energisers energising engineries enginering erinsrinse ferineness ferrieres fingerings fireengine firesirens freenesses fresnieres friesinger geneserine gengineers geringsing gingerness greeneries greengenre greengreen greensfees greifensee grey-green greynesses griesingen griffiness infringers infringing ingressing negrifying ngerengere nigerreign nigger-rig niggerness re-refiner re-signing reengineer refereeing refineries regreening regressing reining-in renessneer renningers resinifies reyingsife riessersee ringfinger risenresin seeing-eye sereneness serre-fine serrefines signifiers signifying sing-sings sissifying sneeriness sniffiness sniggerers sniggering synergises syngenesis