Words That Start With IS

There are over 497 words that begin with IS in English. From 2-letter words to 15-letter entries, find IS-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 IS.

2-Letter Words Starting With IS

Short high-frequency IS-words:

3-Letter Words Starting With IS

Short high-frequency IS-words:

ish

ism

iso

See all 3-letter IS-words

4-Letter Words Starting With IS

Common 4-letter IS-words:

isba

isit

isle

isms

isna

isos

See all 4-letter IS-words

5-Letter Words Starting With IS

Common 5-letter IS-words:

issue

isbas

ishes

isled

isles

islet

isnae

issei

istle

See all 5-letter IS-words

6-Letter Words Starting With IS

Common 6-letter IS-words:

issues

island

issued

isabel

isatin

ischia

islets

isling

isobar

isogon

isohel

isolex

isolog

isomer

isopod

isseis

issuer

istana

isthmi

istles

See all 6-letter IS-words

7-Letter Words Starting With IS

Common 7-letter IS-words:

islands

isotope

issuing

isabels

ischial

islemen

isobare

isobase

isodose

isoetes

isogamy

isogons

isogony

isolate

isolead

isoline

isologs

isopach

issuers

istanas

See all 7-letter IS-words

8-Letter Words Starting With IS

Common 8-letter IS-words:

isolated

isotopes

isabella

isagogic

isarithm

isobutyl

isochasm

isochime

isocline

isoforms

isogrivs

isolates

isoleads

isopachs

isospory

isostasy

isotones

isotypes

isozymes

issuance

See all 8-letter IS-words

101

9-Letter Words Starting With IS

Common 9-letter IS-words:

isolation

ischaemic

isenergic

ismatical

isocheims

isochores

isoclinic

isogonics

isohydric

isomerise

isomerism

isoniazid

isophotes

isopycnic

isosceles

isosmotic

isotactic

isotheres

isotopies

isthmians

See all 9-letter IS-words

10-Letter Words Starting With IS

Common 10-letter IS-words:

isentropic

islomanias

isoaminile

isochasmic

isochroous

isoclinals

isocrymals

isocyanate

isodontals

isoglossic

isoglottal

isolatable

isolations

isomerizes

isometries

isopiestic

isopycnics

isospories

isosporous

isotropous

See all 10-letter IS-words

11-Letter Words Starting With IS

Common 11-letter IS-words:

isapostolic

ischuretics

isinglasses

isoantibody

isochronise

isocyanates

isocyanides

isodiaphere

isogeotherm

isolability

isolecithal

isomerizing

isometrical

isometropia

isomorphous

isopolities

isoprenoids

isorhythmic

isothermals

isotonicity

See all 11-letter IS-words

12-Letter Words Starting With IS

Common 12-letter IS-words:

isoantigenic

isobilateral

isocheimenal

isochromatic

isochronised

isochronisms

isochronizes

isodiapheres

isoenzymatic

isolationism

isolationist

isomagnetics

isoperimeter

isoperimetry

isostemonous

isosthenuria

isoteniscope

isothermally

isotopically

isoxsuprines

See all 12-letter IS-words

13-Letter Words Starting With IS

Common 13-letter IS-words:

ismaticalness

isoantibodies

isocarboxazid

isocheimenals

isochromosome

isochronizing

isochronously

isodimorphism

isoelectronic

isogeothermal

isogeothermic

isolationisms

isolationists

isomerization

isometrically

isospondylous

isostatically

isosthenurias

isotretinoins

isotropically

See all 13-letter IS-words

14-Letter Words Starting With IS

Common 14-letter IS-words:

isentropically

isoagglutinins

isoalloxazines

isocarboxazids

isochromosomes

isodiametrical

isodimorphisms

isogeothermals

isogeothermics

isomerisations

isomerizations

isomorphically

isoperimetries

isopiestically

isoproterenols

See all 14-letter IS-words

15-Letter Words Starting With IS

Common 15-letter IS-words:

ismaticalnesses

isoimmunisation

isoimmunization

isoperimetrical

See all 15-letter IS-words

497 Common Words Starting with IS

Most Common Length

Avg Scrabble Score

(out of 35)

Most Common Ending

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

35 Points

The highest scoring word in Scrabble that starts with IS is isocarboxazids with a total of 35 points.

I 1

S 1

O 1

C 3

A 1

R 1

B 3

O 1

X 8

A 1

Z 10

I 1

D 2

S 1

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

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

There are 497 words in the English dictionary that start with IS, and most of them are 9 letters long (101 words of that length).
What's the longest word starting with IS?

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

Yes. Uncommon words like "isocarboxazid", "isoalloxazine", "isocarboxazids", "isoimmunization" start with IS and can score big thanks to their unusual letters. "isocarboxazids" is worth 35 points in Scrabble before any bonus tiles.
What are the most common words starting with IS?

Most words starting with IS are 9 letters long, including everyday words like "isolation", "ischaemic", "isenergic", "ismatical", "isocheims".

Next to Words Start With IS

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