ekero ephree epopee heehee hehehe hehheh heopop hepper hereke herero herher heroor hohoho hokpok hoohoo hooker hookor hoopee hooper hoopoe hoopoo hooroo hopper horeke hororo horror keeker keeper kehrer keokee kepper kerker kheper khoker khoper khoroo kokkoh kokopo kokoro kokpek kookoo koopoo kopeek koreke korere korero korkor kororo korphe korreh korrek kreker kreope krokek o-hook ohohoh ohpooh okerer okopek okpoko oohooh ookroo oooooo orpeko orphee orrho- peeker peepee peeper peerer pepero pepkor pepper perere peroke peroor perore perper perree perrhe phoro- pookoo pooper poopoo poorer popopo poporo popper poppop porker ppoker pppppp pre-op preore proker prokke prokop proper proph- propho propre reeker reeper rehook rehoop rehope repope repper roeper roepke rokker rokkor rooker roopee roopek rooper rorek