Words That Start With OS

There are over 360 words that begin with OS in English. From 2-letter words to 15-letter entries, find OS-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 OS.

2-Letter Words Starting With OS

Short high-frequency OS-words:

3-Letter Words Starting With OS

Short high-frequency OS-words:

ose

See all 3-letter OS-words

4-Letter Words Starting With OS

Common 4-letter OS-words:

osar

oses

oshi

ossa

osso

See all 4-letter OS-words

5-Letter Words Starting With OS

Common 5-letter OS-words:

oscar

oshac

osier

osmic

osmol

ossia

ostia

See all 5-letter OS-words

6-Letter Words Starting With OS

Common 6-letter OS-words:

oscars

oscine

oscula

oshacs

osiery

osmate

osmics

osmium

osmole

osmols

osmous

osmund

osprey

ossias

ossify

osteal

ostent

ostial

ostium

ostler

See all 6-letter OS-words

7-Letter Words Starting With OS

Common 7-letter OS-words:

oscines

oscules

osiered

osmious

osmiums

osmolar

osmoles

osmosis

osmunda

osmunds

osseins

osseous

ossetra

ossuary

ostiary

ostiate

ostoses

ostraca

ostraka

ostrich

See all 7-letter OS-words

8-Letter Words Starting With OS

Common 8-letter OS-words:

oscinine

oscitant

osculate

osmiates

osnaburg

osselets

ossicles

ossified

ossifies

ossobuco

osteoids

osteomas

osteoses

osterias

ostinato

ostiolar

ostioles

ostracon

ostrakon

ostreger

See all 8-letter OS-words

9-Letter Words Starting With OS

Common 9-letter OS-words:

oscillate

osculated

osculates

osmically

osmundine

ossariums

osseously

ossicones

ossicular

ossifiers

ossifraga

ossifrage

ossobucos

ossuaries

ostensive

osteopath

osteotome

ostiaries

ostosises

ostriches

See all 9-letter OS-words

10-Letter Words Starting With OS

Common 10-letter OS-words:

oscillator

oscillates

oscitating

osculating

osculatory

osmeterium

osmidroses

osmidrosis

osmolality

osmometric

osteitides

ostensoria

osteocytes

osteolysis

osteopaths

ostraceans

ostracised

ostracises

ostracodes

ostrichism

See all 10-letter OS-words

11-Letter Words Starting With OS

Common 11-letter OS-words:

oscillative

oscitations

osculations

ostensively

ostensorium

osteoblasts

osteoclases

osteoclasts

osteogenies

osteography

osteopathic

osteophytes

osteophytic

osteoplasty

osteotomies

ostracisers

ostracoderm

ostreaceous

ostreophage

ostreophagy

See all 11-letter OS-words

12-Letter Words Starting With OS

Common 12-letter OS-words:

oscillations

oscillograms

osculatories

osmolalities

ossification

ostentations

osteogenesis

osteological

osteologists

osteomalacia

osteomalacic

osteopathies

osteopathist

osteoplastic

osteoporoses

osteoporosis

osteoporotic

osteospermum

ostracizable

ostracoderms

See all 12-letter OS-words

13-Letter Words Starting With OS

Common 13-letter OS-words:

oscillational

oscilloscopes

oscilloscopic

osteichthyans

ostensiveness

osteofibroses

osteofibrosis

osteographies

osteomalacial

osteomalacias

osteomyelitis

osteonecrosis

osteonecrotic

osteopathists

osteopetroses

osteopetrosis

osteoplasties

osteosarcomas

osteospermums

ostreophagous

See all 13-letter OS-words

14-Letter Words Starting With OS

Common 14-letter OS-words:

oscillographic

osmometrically

osmoregulation

osmoregulatory

ostentatiously

osteoarthritic

osteoarthritis

osteoarthroses

osteoarthrosis

osteodermatous

osteologically

osteosarcomata

ostreicultures

See all 14-letter OS-words

15-Letter Words Starting With OS

Common 15-letter OS-words:

oscillographies

osmoregulations

ostensibilities

osteoarthritics

osteomyelitides

osteomyelitises

osteopathically

ostreiculturist

See all 15-letter OS-words

360 Common Words Starting with OS

Most Common Length

Avg Scrabble Score

(out of 25)

Most Common Ending

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What is the highest scoring word in
Scrabble that starts with OS?

25 Points

The highest scoring word in Scrabble that starts with OS is ostracizable with a total of 25 points.

O 1

S 1

T 1

R 1

A 1

C 3

I 1

Z 10

A 1

B 3

L 1

E 1

adjective 1. Capable of being ostracized.

Words that begin with OS 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 OS and words with OS. Try our five letter words starting with OS 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 OS

How many words starting with OS are in the English dictionary?

There are 360 words in the English dictionary that start with OS, and most of them are 10 letters long (56 words of that length).
What's the longest word starting with OS?

The longest word starting with OS is "osteomyelitides" at 15 letters long. If you're looking for a more everyday word, "oscillator" is the longest common word starting with OS.
Are there any rare words starting with OS worth more in Scrabble?

Yes. Uncommon words like "ostracizable", "ostracizer", "ostracize", "ostracizing" start with OS and can score big thanks to their unusual letters. "ostracizable" is worth 25 points in Scrabble before any bonus tiles.
What are the most common words starting with OS?

Most words starting with OS are 10 letters long, including everyday words like "oscillator", "oscillates", "oscitating", "osculating", "osculatory".

Next to Words Start With OS

Explore words by letter combinations to grow your vocabulary.