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

... OPERION ... (23 elements)

de (1) : COPERION

fr (22) : COOPERIONS · DOPERIONS · DROPERIONS · ENOPERIONS · ESTROPERIONS · GALOPERIONS · NOPERIONS · REOPERIONS · SALOPERIONS · VARLOPERIONS

... OPERIO ... (61 elements)

BIOPERIODICITE · BIOPERIODICITY · COOPERIONS · COPERION · ECOPERIONS · MAGNETOSCOPERIONS · PACHYDERMOPERIOSTOSE · RADIOSCOPERIONS · SYNCOPERIONS · TELESCOPERIONS

... PERION ... (216 elements)

ANTICIPERIONS · CHIPERIONS · EMANCIPERIONS · ETRIPERIONS · EXCIPERIONS · HIPERION · PARTICIPERIONS · PERION · PIPERIONS · RIPERIONS

... COPERION ... (6 elements)

COPERION · ECOPERIONS · MAGNETOSCOPERIONS · RADIOSCOPERIONS · SYNCOPERIONS

... DOPERION ... (1 element)

DOPERIONS

... EOPERION ... (1 element)

REOPERIONS

... HOPERION ... (1 element)

CHOPERIONS

... LOPERION ... (6 elements)

CLOPERIONS · ECLOPERIONS · ESCALOPERIONS · GALOPERIONS · SALOPERIONS

... NOPERION ... (2 elements)

ENOPERIONS · NOPERIONS

... OOPERION ... (1 element)

COOPERIONS

... OPERIONS ... (22 elements)

CHOPERIONS · CLOPERIONS · ECLOPERIONS · ESCALOPERIONS · GALOPERIONS

... ROPERION ... (2 elements)

DROPERIONS · ESTROPERIONS

... SOPERION ... (1 element)

DESOPERIONS

... TOPERION ... (1 element)

TOPERIONS