OK

1. Satisfactory; not very good or very bad.

old shoe

Something or someone comfortably familiar, especially in an unpretentious manner.

Olympian

1. Lofty; surpassing others.

ombrifuge

Something that provides protection from the rain, especially an umbrella.

ombudsman

An official who investigates complaints by individuals against an organization.

omnishambles

A situation that is a complete mess, especially when resulting from mismanagement.

ontic

Having or relating to a real existence.

onymous

Bearing the author’s name; named.

ooftish

Money or cash.

open sesame

Something that is an easy and effective way to bring out a desired result, gain access, etc.

oracy

The ability to express oneself in speech.

orature

Songs, poems, stories, etc., transmitted orally across generations.

ordonnance

The systematic arrangement of parts in art, literature, architecture, etc.

orogeny

Folding and faulting of the earth’s crust resulting in mountain formation.

orography

The study of the physical geography of mountains, such as features, topographic relief, etc.

ostrichism

The act or policy of refusing to face reality or unpleasant facts.

ostrobogulous

Unusual; bizarre; risqué or indecent.

outgrabe

To emit strange noises, such as bellowing, whistling, and shrieking.

Overton window

The range of beliefs, attitudes, etc., considered acceptable at any given time.

oxygeusia

An acute sense of taste.

oxytone

Having stress on the last syllable.

Pactolian

Golden; lavish.

paean

An expression of praise, joy, or triumph, typically in the form of a song.

palmary

Of supreme importance; outstanding; praiseworthy.

palmate

Shaped like a hand with the fingers spread.

panacea

A remedy for all difficulties or diseases; a universal cure.

panderer

One who caters to the base desires, whims, or prejudices of others.

Panglossian

Blindly or unreasonably optimistic.

papier-mache

A mixture of pulped paper, glue, etc., used in making sculptures, boxes, ornaments, etc.

parish pump

A water pump shared by people within a small area.