O字開(kāi)頭的單詞或詞組
ointmentolfactoryoatmealousteroutnumberon the houseOLEorthogonalogiveoverallson the telephoneoutcaston tapoutput powerob-on the increaseout of dangerorange juiceoverkillophthalm-O-levelon the edge ofoff-trackoutbackon the shelforioleoryxoximeteroverrateoutward-boundoutwardlyon the part ofObsomnibusoff seasonoo-opportunity costopineoboeobservanceordealoutlay
