di-iod- di-tri- dihydr- dihydro diiodo- diritto dithio- dod-rot doo-doo doridid dorohoi dorothy dortoir dortory dry-rot hitoiro hoo-hoo hot-rod hottodd hryhory hydrido hydroid ididtoo idiotry idoodit iridio- iridoid iry-hor itororo oidioid otoitid ottrott rddhi ridotto riitiir riodoro riotord rootrot rotoiti thoddoo thyroid tittyry tohorot toi-toi too-hoo too-too toritto toroidh torroid tototoo tottori triiodo tritory tro-tro yoo-hoo yor-yor