Words That Start With OS

There are over 343 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

4-Letter Words Starting With OS

Common 4-letter OS-words:

osar

oses

ossa

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

oscule

osetra

oshacs

osiers

osiery

osmate

osmics

osmole

osmols

osmose

osmund

osprey

ossify

osteal

ostium

ostler

ostomy

See all 6-letter OS-words

7-Letter Words Starting With OS

Common 7-letter OS-words:

osetras

osiered

osmates

osmiate

osmiums

osmolar

osmosed

osmunda

osseous

osseter

ossicle

ossific

ossuary

ostents

osteoid

osteoma

ostiole

ostlers

ostraka

ostrich

See all 7-letter OS-words

8-Letter Words Starting With OS

Common 8-letter OS-words:

oscitant

oscitate

osculate

osmiates

osmosing

osmundas

osnaburg

ossature

ossicles

ossifier

ossobuco

osteitic

osteogen

osteoses

osteosis

ostinati

ostmarks

ostomies

ostracod

ostracon

See all 8-letter OS-words

9-Letter Words Starting With OS

Common 9-letter OS-words:

oscitance

oscitancy

oscitated

oscitates

osculated

osmeteria

osmically

osmometer

osmometry

osmundine

osnaburgs

ossifiers

ossuaries

osteocyte

osteology

osteopath

ostleress

ostracean

ostracise

ostracism

See all 9-letter OS-words

10-Letter Words Starting With OS

Common 10-letter OS-words:

oscillator

oscillated

oscitances

oscitating

osculating

osmidrosis

osmometers

osmundines

ossifragas

osteitides

osteitises

ostensibly

osteoclast

osteocolla

osteopaths

osteotomes

ostraceans

ostraceous

ostracisms

ostracodan

See all 10-letter OS-words

11-Letter Words Starting With OS

Common 11-letter OS-words:

oscillation

oscitancies

oscitations

osmometries

ostensorium

osteoblasts

osteodermal

osteodermic

osteography

osteologist

osteopathic

osteoplasty

osteotomies

ostleresses

ostracisers

ostracising

ostracizing

ostreaceous

ostreophage

ostrichisms

See all 11-letter OS-words

12-Letter Words Starting With OS

Common 12-letter OS-words:

oscillations

oscillograms

osculatories

osmolarities

osteichthyan

osteodermous

osteogeneses

osteogenesis

osteogenetic

osteological

osteologists

osteomalacia

osteomalacic

osteoplastic

osteoporoses

osteoporotic

osteosarcoma

ostracisable

ostracizable

ostracoderms

See all 12-letter OS-words

13-Letter Words Starting With OS

Common 13-letter OS-words:

oscillational

oscillographs

oscillography

oscilloscopes

oscilloscopic

osteichthyans

ostensibility

osteofibroses

osteofibrosis

osteographies

osteomalacial

osteomalacias

osteomyelitis

osteopathists

osteopetroses

osteopetrosis

osteoplasties

ostreiculture

ostreophagies

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

osteomyelitises

osteopathically

ostreiculturist

See all 15-letter OS-words

343 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 343 words in the English dictionary that start with OS, and most of them are 10 letters long (52 words of that length).
What's the longest word starting with OS?

The longest word starting with OS is "osteoarthritics" 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", "oscillated", "oscitances", "oscitating", "osculating".

Next to Words Start With OS

Explore words by letter combinations to grow your vocabulary.