diddums didimus didymis didymus dimyids dismiss disrump dissidy disspur dissury dripdry drumsup dry-dip dum-dum dumdums dummyup durdums durissy iprimus iridium isidids isidium isidudu middiss mirmiru mirpuri mississ muddyup murdris murdrum murmuri murmurs mussids muu-muu muumuus piirumi piisupi pip-pip piprids piss-up primips prudius psidium psydrus pui-pui pum-pum pumpuri purisms purpris pussums pyurids riddims rum-dum rumdums russism siddurs sim-sim simsimi sirmium sirpurr sisyrid smiddum spissid spurius ssipsis sssssss suiriri summiss surdism surmurd sursum- suspiry suurupi syrmium umuduri upupids uridium yip-yip ymummyd yum-yum