O字开头的单词或词组
oil sealoriginal copyomniscientovertoneobject-orientedoratoryout of syncoodlesoathsovercrowdoropharynxoastouter spaceowletoccludeOEMopen-endout of questionoutspeakone-timeOv.outerwearoff the rackobstructingO. D.opinionatedopiateoutmodedonce too oftenopenlyoverfillopen interestoverridingoftentimesonenessostracismon the beatofferorout of tuneof noteoverstayoligopoly
