Words That Start With O
There are over 8.9K 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
obe
ods
ois
oke
oma
oom
ose
oup
owe
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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
obit
ohia
oons
oose
oozy
oxic
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
odalisques
outjesting
outthought
outwinging
11-Letter Words Starting With O
Common 11-letter O-words:opportunity
operational
observation
orientation
outstanding
obligations
originating
overlapping
oscillogram
ostracizing
ouroboroses
outbargains
outsourcing
overflowing
overglazing
overharvest
overnourish
overpeoples
overprizing
oxaloacetic
12-Letter Words Starting With O
Common 12-letter O-words:organization
occasionally
observations
organisation
overwhelming
optimization
ochlophobics
octastichous
oligochaetes
opeidoscopes
orchidectomy
organogenies
orogenically
orthographer
osteological
outorganizes
overplanning
overswearing
overutilises
oxidisations
13-Letter Words Starting With O
Common 13-letter O-words:organizations
opportunities
organisations
obtrusiveness
odontophorans
oligopeptides
onerousnesses
ophiomorphous
ornamentation
ornithophobia
orthodiagonal
orthogonality
ossifications
ostreophagous
outpopulating
overconfident
overpopulated
overreliances
overshowering
overstability
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14-Letter Words Starting With O
Common 14-letter O-words:organizational
obsoletenesses
obstructionist
onomatopoieses
opisthocoelian
opisthoglossal
organographies
orthocephalies
orthohydrogens
orthopinakoids
osmoregulation
osteosarcomata
overcentralise
overencouraged
overfulfilling
overhomogenise
overkindnesses
overparticular
overproduction
overripenesses
15-Letter Words Starting With O
Common 15-letter O-words:objectivenesses
obtainabilities
obtrusivenesses
offensivenesses
officiousnesses
oophorectomised
ophthalmologist
opportunenesses
opprobriousness
organochlorines
orthopaedically
osmoregulations
overaccentuated
overconsumption
overdependences
overeagernesses
overidentifying
overprotections
overspeculation
ovoviviparously
8,937 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 8,937 words in the English dictionary that start with O, and most of them are 9 letters long (1,447 words of that length).
What's the longest word starting with O?
The longest word starting with O is "obtrusivenesses" 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", "objectivize", "oxidization", "oxidizable" 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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