ar: Arabic · bg: Bulgarian · cs: Czech · da:Danish · de: German · el: Greek · en: English · es: Spanish · et : Estonian · fa: Persian · fi: Suomi · fr: French · he: Hebrew · hi: Hindi · hr: Croatian · hu: Hungarian · id: Indonesian · is: Icelandic · it: Italian · ja: Japanese · ko: Korean · lt: Lithuanian · lv: Latvian · nl: Dutch · no: Norwegian · pl: Polish · pt: Portuguese · ro: Romanian · ru: Russian · sk: Slovak · sl: Slovenian · sr: Serbian · sv: Swedish · th: Thai · tr: Turkish · vi: Vietnamese · zh: Chinese

... RDUOU ... (4 elements)

... DUOU ... (22 elements)

ARDUOUS · ARDUOUSLY · ARDUOUSNESS · ARDUOUSNESSES · DECIDUOUS · DECIDUOUSNESS · DIVIDUOUS · OCCIDUOUS · PROCIDUOUS · SUCCIDUOUS

... RDUO ... (25 elements)

ARDUOUS · ARDUOUSLY · ARDUOUSNESS · ARDUOUSNESSES · DESIGNERDUOS · FORSCHERDUOS · INTERIMSTRAINERDUO · KLAVIERDUO · KUNSTLERDUO · SCHULERDUO

... ARDUOU ... (4 elements)

ARDUOUS · ARDUOUSLY · ARDUOUSNESS · ARDUOUSNESSES

... RDUOUS ... (4 elements)

ARDUOUS · ARDUOUSLY · ARDUOUSNESS · ARDUOUSNESSES