The rare daily word game sweeping the globe. Find what's hidden in plain sight.
OSTIUM
Definition of OSTIUM
noun
A small opening or orifice, as in a body organ or passage.
Wiktionary · CC BY-SA
Where it comes from
Borrowed from Latin ōstium.
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.
OSTIUM in OUTLIER
It has fitted 1 board so far.
It first turned up on Day 8, 29 May 2026. Nobody has seen it on a board for 98 days.
First found by a player on Day 29, 18 June 2026.
Built from these letters
OSTIUM starts with O and ends with M. Sorted, its letters read IMOSTU - 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.
Also seen on Day 8
Could you have found OSTIUM?
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 8 - and most players walked straight past it.
Play today's OUTLIER