Osmosis
Ozone
Oxygen
Oxide
Organ
Organism
Organelle
Observation
ope
ope
oats
Osculate and Orgasm
ope
People are complimented when you tell them their performance was outstanding. It begins with the letter o.
ovate ovary ovals
A herb beginning with the letter "o" is oregano.
One "wow"word (or phrase) beginning with O is "Oh my goodness!" Another = "Oh Wow!"
Feline mammal of south America beginning with the letter O is an "ocelot."
observatory, observation, object, observe, oriental, body parts , you name it.
Some names beginning with the letter O are:OlafOleanderOliveOliverOllieOmarOpalOpheliaOprahOrvilleOscarOtto