ornament
thats all i can think of...
10 letter words that start with the letter O:obedientlyobituariesobjectivesobligationobligatoryobliterateobservanceobstetricsobstructedoccasionaloccupationoccurrenceoceanfrontoceangoingofficiallyoftentimesoldfangledomnipotentoperationsoppositionoppressiveoptimisticoratoricalorchestrasordinarilyordinationoriginallyornamentalostensiblyostracizedoutfielderoutflankedoutlandishoutperformoutrageousoveractiveoverchargeoverturned
Oboe thats all I can think of at the moment
osteoporosis
Toucan is the word.
Lions can be described as overpowering. The word starts with the letter o.
Offensive is a synonym for horrible. It begins with the letter O.
Five letter words that start and end with letter O are outdo and outgo.
Some four letter words that start and end with O are:oleoOreoorzo
Outstanding is a flattering word. It begins with O.
Outstanding is a friendly word. It begins with the letter o.
Overdue payment is a business word. It begins with the letter O.
orangutan
Indigo
opal
outstanding
Governs.
No 5 letter word in the English language starts with the letter O and ends with the letter Z.