The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CAPSTONE
Definition of CAPSTONE
noun
Any of the stones making up the top layer of a wall; a coping stone.
Wiktionary · CC BY-SA
Where it comes from
From Middle English capston; equivalent to cap + stone.
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.
CAPSTONE in OUTLIER
Players have found it on 9 boards so far. 58 players have found it across Outlier's history.
It first turned up on Day 39, 28 June 2026. The most recent board was Day 95, 23 August 2026. It was on the latest finished board.
First found by a player on Day 39, 28 June 2026.
Built from these letters
CAPSTONE starts with C and ends with E. Sorted, its letters read ACENOPST - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start CAPSTO
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 39
Could you have found CAPSTONE?
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 39 - and most players walked straight past it.
Play today's OUTLIER