The rare daily word game sweeping the globe. Find what's hidden in plain sight.

ISOS

4 letters

Definition of ISOS

noun

plural of iso

Wiktionary · CC BY-SA

Rarity score
Withheld
Revealed only in play
Tier
Withheld
Find it yourself

OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.

ISOS in OUTLIER

Players have found it on 2 boards so far.

Day 1Day 124
Its 2 boards, across 124 finished boards · taller bars are busier boards
2
Boards found on
76
First board
124
Latest board
48
Longest gap, days

It first turned up on Day 76, 4 August 2026. The most recent board was Day 124, 21 September 2026. It was on the latest finished board.

First ever to find it

zetsu

on Day 76, 4 August 2026 - before anyone else in Outlier's history. See the Pioneers

Built from these letters

ISOS
4
Letters
2
Vowels
2
Consonants
3
Different letters
1
Longest consonant run
1
Longest vowel run

ISOS starts with I and ends with S. Sorted, its letters read IOSS - the shape to hunt for when the grid is scrambled. S appears more than once.

Words that start ISOS

Its neighbours in the OUTLIER dictionary - shortest first.

ISOSPINISOSPINSISOSPORYISOSTACYISOSTASYISOSCELESISOSMOTICISOSTATICISOSTERICISOSEISMALISOSEISMICISOSPORIES

Could you have found ISOS?

OUTLIER is a daily word game. One grid, the same grid for everybody, and the words nobody else spots are the ones that pay. This word was on Day 76 - and most players walked straight past it.

Play today's OUTLIER

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The OUTLIER card for ISOSDownload image