Words That Start With O
There are over 9.4K words that begin with O in English. From 2-letter words to 15-letter entries, find O-words grouped and sortable by length below, all valid in Scrabble, Wordle, and Words With Friends. You can also see five letter words starting with O.
2-Letter Words Starting With O
Short high-frequency O-words:of
on
or
ob
od
oe
oh
oi
ok
om
oo
op
os
ou
ow
ox
oy
3-Letter Words Starting With O
Short high-frequency O-words:one
out
own
off
old
our
oil
odd
ore
oak
oar
oes
oho
ony
oof
orf
ova
owl
oxo
oye
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4-Letter Words Starting With O
Common 4-letter O-words:only
over
once
open
ones
onto
oral
otto
odds
oath
owns
owed
oils
obey
oaty
obes
oiks
oppo
ouma
oyez
5-Letter Words Starting With O
Common 5-letter O-words:other
often
order
occur
older
offer
owned
opera
orbit
outer
ocean
owner
organ
oxide
opens
owing
onset
ought
ozone
opium
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6-Letter Words Starting With O
Common 6-letter O-words:others
office
object
opened
occurs
output
origin
orders
offers
oxygen
oldest
online
obtain
oxford
option
owners
organs
orange
openly
operas
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7-Letter Words Starting With O
Common 7-letter O-words:outside
objects
offered
ordered
opening
overall
opposed
operate
officer
opinion
offices
optical
organic
origins
obvious
ongoing
options
olympic
outcome
orbital
8-Letter Words Starting With O
Common 8-letter O-words:original
official
observed
occurred
officers
obtained
opposite
operated
ordinary
offering
occupied
operator
operates
occasion
opponent
opposing
overcome
overseas
opinions
observer
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9-Letter Words Starting With O
Common 9-letter O-words:operating
operation
officials
otherwise
organized
organisms
objective
opponents
ownership
offensive
operators
occasions
occurring
orchestra
offspring
observers
organised
oxidation
observing
obtaining
10-Letter Words Starting With O
Common 10-letter O-words:originally
operations
opposition
officially
originated
occupation
occasional
objectives
occurrence
obligation
orchestral
organizing
oscillator
objections
observable
originates
oligoclase
osmidroses
overstocks
overtaught
11-Letter Words Starting With O
Common 11-letter O-words:opportunity
operational
observation
orientation
outstanding
obligations
originating
overlapping
obsolescent
odontocetes
opinionator
orthopnoeas
osteoclasts
outbreathes
overflowing
overfreedom
overleather
overslipped
overstudied
overwrought
12-Letter Words Starting With O
Common 12-letter O-words:organization
occasionally
observations
organisation
overwhelming
optimization
obsoleteness
odorimetries
oligopsonies
omnipresence
opposability
osteogenetic
osteological
ostreophages
outrebounded
overdelicacy
overlighting
overpayments
oversteering
overthinning
13-Letter Words Starting With O
Common 13-letter O-words:organizations
opportunities
organisations
octodecillion
odontoblastic
odontophorans
oecumenically
officiousness
ongoingnesses
orchidomanias
orthographist
overamplified
overgoverning
overlavishing
overorganises
overprocessed
oversaturates
overscheduled
overservicing
overthwarting
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14-Letter Words Starting With O
Common 14-letter O-words:organizational
obsoletenesses
occasionalisms
oesophagoscopy
onomatopoiesis
ophidiophobias
opisthocoelian
organisability
organisational
orthonormality
overcentralize
overcommitment
overdependence
overengineered
overfulfilment
overglamorises
overnutritions
overpressuring
overregulating
oystercatchers
15-Letter Words Starting With O
Common 15-letter O-words:odontorhynchous
oestrogenically
oligodendrocyte
omnidirectional
ophthalmoscopes
opisthographies
organometallics
ornithomimosaur
ornithorhynchus
overabstraction
overaccentuates
overadjustments
overarticulated
overconsumption
overembellishes
overextrapolate
overintensities
overmultituding
overprescribing
oxyphenbutazone
9,410 Common Words Starting with O
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What is the highest scoring word in
Scrabble that starts with O?
The highest scoring word in Scrabble that starts with O is oxyphenbutazone with a total of 41 points.
Words that begin with O are commonly used for word games like Scrabble and Words with Friends. This list will help you to find the top scoring words to beat the opponent. You can also find a list of all words that end in O and words with O. Try our five letter words starting with O page if you’re playing Wordle-like games or use the New York Times Wordle Solver for finding the NYT Wordle daily answer.
FAQ Words That Start With O
How many words starting with O are in the English dictionary?
There are 9,410 words in the English dictionary that start with O, and most of them are 9 letters long (1,487 words of that length).
What's the longest word starting with O?
The longest word starting with O is "organometallics" at 15 letters long. If you're looking for a more everyday word, "organizational" is the longest common word starting with O.
Are there any rare words starting with O worth more in Scrabble?
Yes. Uncommon words like "oxyphenbutazone", "objectivization", "oxidization", "objectivize" start with O and can score big thanks to their unusual letters. "oxyphenbutazone" is worth 41 points in Scrabble before any bonus tiles.
What are the most common words starting with O?
Most words starting with O are 9 letters long, including everyday words like "operating", "operation", "officials", "otherwise", "organized".
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