Collins Dictionaries - Collins English Dictionary and Thesaurus Essential

officious

offing

off-licence

offline

off-road

offset

offshoot

offside

offspring

oft

often

Og

oganesson

ogle

ogre

oh

ohm

OHMS

oil

oilfield

oil rig

oilskin

oily

ointment

O.K.

okapi

okay

okra

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old

olden

old-fashioned

old guard

old hat

oldie

old maid

old master

Old Nick

old school tie

Old Testament

Old World

oleaginous

oleander

olfactory

oligarch

oligarchy

olive

olive branch

olive-green

Olympian

Olympic Games

ombudsman

omelette

omen

ominous

omission

omit

omnibus

omnipotent

omnipresent

omniscient

omnivore

omnivorous

on

once

once-over

oncogene

oncology

oncoming

one

one-armed bandit

one-liner

oneness

one-night stand

onerous

oneself

one-sided

one-way

ongoing

onion

online

onlooker

only

onomatopoeia

onset

onside

onslaught

onto

ontology

onus

onward

onyx

oodles

ooze

opacity

opal

opalescent

opaque

op. cit.

OPEC

open

opencast mining

open day

open-handed

open-hearted

open-heart surgery

open house

opening

open letter

open-minded

open-plan

open prison

open source

open verdict

opera

operate

operatic

operation

operational

operative

operator

operetta

ophthalmic

ophthalmic optician

ophthalmology

opiate

opine

opinion

opinionated

opinion poll

opium

opossum

opponent

opportune

opportunist

opportunity

opportunity shop

oppose

opposite

opposition

oppress

oppressive

opprobrium

op-shop

opt

optic

optical

optical fibre

optician

optics

optimal

optimism

optimize

optimum

option

optional

optometrist

opt out

opulent

opus

or

oracle

oracular

oral

orange

orangeade

orangery

orang-utan

oration

orator

oratorio

oratory

orb

orbit

orca

orchard

orchestra

orchestrate

orchid

ordain

ordeal

order

orderly

ordinal number

ordinance

ordinarily

ordinary

ordination

ordnance

Ordnance Survey

ordure

ore

oregano

organ

organdie

organic

organism

organist

organization

organize

orgasm

orgy

oriel window

orient

Orient

Oriental

orientate

orientation

orienteering

orifice

origami

origin

original

original sin

originate

oriole

ormolu

ornament

ornate

ornithology

orphan

orphanage

orphaned

orrery

orris

orthodontics

orthodox

Orthodox

Orthodox Church

orthography

orthopaedics

oryx

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Oscar

oscillate

oscilloscope

osier

osmium

osmosis

osprey

ossify

ostensible

ostentation

osteopathy

osteoporosis

ostracize

ostrich

other

otherwise

otherworldly

otiose

otter

ottoman

Ottoman

ouch

ought

Ouija board

ounce

our

ours

ourselves

ousel

oust

out

out-

outback

outbid

outboard motor

outbox

outbreak

outburst

outcast

outclass

outcome

outcrop

outcry

outdated

outdo

outdoor

outdoors

outer

outermost

outer space

outface

outfield

outfit

outfitter

outflank

outgoing

outgoings

outgrow

outgrowth

outhouse

outing

outlandish

outlaw

outlay

outlet

outline

outlook

outlying

outmanoeuvre

outmoded

outnumber

out-of-date

outpatient

outpost

outpouring

output

outrage

outrageous

outré

outrider

outrigger

outright

outrun

outset

outshine

outside

outsider

outsize

outskirts

outsmart

outspan

outspoken

outstanding

outstrip

outtake

outward

outweigh

outwit

ouzel

ova

oval

ovary

ovation

oven

over

over-

overall

overarm

overawe

overbalance

overbearing

overblown

overboard

overcast

overcoat

overcome

overcrowded

overdo

overdose

overdraft

overdraw

overdrawn

overdrive

overdue

overgrown

overhaul

overhead

overheads

overhear

overjoyed

overkill

overland

overlap

overleaf

overlook

overly

overnight

overpower

overreach

override

overrule

overrun

overseas

oversee

overshadow

oversight

overspill

overstay

overstayer

overt

overtake

overthink

overthrow

overtime

overtone

overture

overturn

overweight

overwhelm

overwrought

ovoid

ovulate

ovum

owe

owl

own

ox

Oxbridge

Oxfam

oxide

oxidize

oxygen

oxygenate

oxymoron

oyez

oyster

oystercatcher

oz

Oz

ozone

ozone layer

Return to Search Index A-Z Search Index A-Z To search for a word in the dictionary & thesaurus, tap on your app's search icon (typically a magnifying glass ), then type in a word. Alternatively, you may use this section to browse the dictionary.

p

P

p.

pa

PA

p.a.

pace

pacemaker

pachyderm

pacifist

pacify

pack

package

package holiday

packet

packhorse

pack ice

pack in

pact

pad

padding

paddle

paddle steamer

paddle wheel

paddock

paddy

pademelon

padlock

padre

paean

paediatrician

paediatrics

paedophile

paedophilia

paella

pagan

page

pageant

pageantry

pageboy

pagination

pagoda

paid

pail

pain

painful

painkiller

painstaking

paint

painter

painting

pair

paisley pattern

pajamas

pakeha

Pakistani

pal

palace

palaeography

Palaeolithic

palaeontology

Palagi

palatable

palate

palatial

palaver

pale

palette

palindrome

paling

palisade

pall