O字開頭的單詞或詞組
on the runoxycodoneoceanicon-timeobservableoutcastoil pressochoverindulgenceOne cannot make a silk purse out of a sow's earomeletteodometerovertookout of pocketonrushonanismosmosison trialoffice hoursold-timeoriginationold stockon the joboomphout of stepout of useobscenityorbitalorthodonticsopening balanceon grounds ofoff-lineocarinaoutburstOCon the fenceorthographicovertime workoff-dutyoff-dayodorlessof purpose
