Mammoth Uncensored Word List:
40 words ending with ul, 11 letters long

affrightful amplexicaul carriageful conflictful cupboardful disgraceful dishpansful dispatchful disquietful distasteful distressful distrustful droppersful increaseful mischiefful misdoubtful mistrustful noncolorful noneventful nonfaithful nonforceful overcareful pitchersful plattersful pleasureful prestigeful reproachful researchful resourceful satchelsful strengthful suspenseful teapoonsful teaspoonful thimblesful tumblersful unbeautiful unhealthful unreposeful unresentful