An omnibus is one.
Omnibus.
ominbus
· Oxcart · Outrigger boat · Odyssey (Honda) · Oldsmobile · Omega (Oldsmobile) · Omni (Honda) · Opel
A few examples of 3-letter words starting with the letter O are:owloweoaroatown
Some six letter words starting with O are:objectoblongoccultocelotoddityoffendofficeorangeorioleorphanoverdooxygen
insects starting with letters O X and Z
octos
Only one country starts with the letter O, which is Oman.
The elements that start with the letter O are oxygen & Osmium.
Outstanding is a nice word. It begins with the letter O.
OLDSMOBILE
yes there is
Overcoat