O字開頭的單詞或詞組
O.outfitonce againomegaoptimizationof oneselfovenODoccupationon the groundout of itorganiseoperativeoughtoverseasover and over againOctoberoddsout ofoverlayover thereoaron one's ownoccasionaloriginalityother thanon the sceneoversizeoptorphanon the sideobsessiveoutsideroverviewoverlordorientotheroctopusonlineon occasiononce in a whileorchestra
