Mammoth Uncensored Word List:
81 words ending with ds, 13 letters long

amphidiploids antherozooids bachelorhoods battlegrounds bioflavonoids carryforwards checkerboards chequerboards chesterfields chimneyboards clapperboards counterpleads countertrends counterworlds creaturehoods cricothyroids cysticercoids daughterhoods draughtboards exgirlfriends farthinglands feldspathoids flannelboards flashforwards flavoproteids flutterboards fountainheads gangsterlands griddlebreads harmonichords hemispheroids henceforwards hexagrammoids househusbands hydrocolloids hyperthyroids hypotrochoids incrossbreeds leucoplastids lightningrods merrygorounds misapprehends multiplicands neighborhoods nucleocapsids orthopteroids overwithholds parasphenoids pentacrinoids phospholipids pickerelweeds plasterboards plerocercoids quadrilliards quinquenniads quintilliards renostervelds salamandroids scolopendrids scraperboards scratchboards scratchbuilds scrieveboards sedecilliards shuffleboards southernwoods spermatozoids sphingolipids spinsterhoods standardbreds straightbreds strangleholds thoroughbreds thousandfolds throttleholds thunderclouds undecilliards unlikelihoods unthriftyheds vacationlands xanthochroids