The rare daily word game sweeping the globe. Find what's hidden in plain sight.
COISTREL
Definition of COISTREL
noun
Alternative form of custrel.
Wiktionary · CC BY-SA
Where it comes from
From Old French coustillier (“soldier armed with a coustille (“double-edged sword”)”).
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.
COISTREL in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 87, 15 August 2026. Nobody has seen it on a board for 8 days.
First found by a player on Day 87, 15 August 2026.
Built from these letters
COISTREL starts with C and ends with L. Sorted, its letters read CEILORST - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
3 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start COISTR
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found COISTREL?
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 72 - and most players walked straight past it.
Play today's OUTLIER