The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CODOMAIN
Definition of CODOMAIN
noun
The target set into which a function is formally defined to map elements of its domain; the set denoted Y in the notation f : X → Y. The set B.
Wiktionary · CC BY-SA
Where it comes from
From co- + domain.
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
CODOMAIN in OUTLIER
Players have found it on 4 boards so far.
It first turned up on Day 10, 30 May 2026. The most recent board was Day 78, 6 August 2026. Nobody has seen it on a board for 43 days.
First ever to find it
on Day 10, 30 May 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
CODOMAIN starts with C and ends with N. Sorted, its letters read ACDIMNOO - the shape to hunt for when the grid is scrambled. O appears more than once.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Also seen on Day 10
Could you have found CODOMAIN?
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 10 - and most players walked straight past it.
Play today's OUTLIER