O字开头的单词或词组
oomphOCoxycodoneold stockoil sealon trialof purposeoffenceoriginationoppositelyoverrateopening balanceout of stepout of useon the declineoffice hoursoff-dutyon grounds oforthodonticsout of syncoutcastoriginal copyopiumovercrowdoceanicon the fenceoodlesoverflewon-timeout of questionowleton the jobopen-endoff-lineodometerone-timeodorlessout of pocketovertoneovertime workosmosisoverboard