Letter "O"

     Here's a nice round letter to be thankful for - the letter"O." Along with this letter comes things like.....

• Owls
• Oranges
• Oatmeal
• Oil
• Ovens
• Opometrists
• Opals
• Oddballs
• Open
• Odes
• Odors
• Ores & Oars
• On & Off
• Others

What else can you add to this list beginning with the letter "O" that you're thankful for?