Overalls!
Obi
Overcoat.
I think you mean "Wear" - Overcoat?
People wear orthopedic shoes and overshoes. They begin with the letter O.
overcoatoverallsoxford shirtOld Navy shirtovershoes
overalls oxford shirt open-toed shoes overcoat
Something that you wear that starts with the letter I is: "I'm with Stupid" T-shirt Irish Skirt
overcoat
You can wear an apron.
anorak
Something that a person could wear that starts withthe letter "k" could be Kneehighs:)