100 (number one hundred)

Barrel organ

Bite off

Branch office

Break off

Camera obscura

Ceiling of the room

Chairman / Chief executive officer

Clean out

Command (order)

Cross out

Customs

End of the world

Get off

Go out

Government office

Help out

Honor guard

Jungle (Old-growth forest)

Lay out

Mendicant orders

Non-commissioned officer

Oak (tree)

Oak leaf cluster

Oath

Obesity (fatness)

Objection

Objectives

Obligation

Observed

Obsession

Obverse

Occlusion

Occupation

Ocean

Offensiveness

Offer

Office

Office

Office supplies

Official mail

Offshoot

Ogle

Oilcloth

Old age

Old love

Old people

Old woman (wife)

Old-fashioned

One (number 1)

One-eyed

One-horse carriage

One-way street

Onion Cake

Onions

Ophthalmology

Orange

Orbit

Orchard

Order

Origanum

Ornament (art)

Ornamental object

Orphan

Orphan

Ossification

Ossuary

Ounce

Outbreak

Outer space

Outlook (view)

Outsider

Oven

Oversalt

Oyster

Pay off

Pour out

Pump out

Put on clothes

Railroad official

Rent out

Ride off

Rod of Asclepius (Staff of Aesculapius)

Sacrament of Penance (Catholic Church)

Scrape off

Slap on the face

Smell of burning

Spat on

Tear out

To be on the way (travel)

Trailer

Undress (Take off)

Wash out

Wipe out

Wire obstacle

Wreath of oak leaves

Wring out