The rare daily word game sweeping the globe. Find what's hidden in plain sight.
OSTIOLAR
Definition of OSTIOLAR
adjective
Of or pertaining to the ostiole.
Wiktionary · CC BY-SA
Where it comes from
From ostiole + -ar.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
OSTIOLAR in OUTLIER
Players have found it on 4 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 129, 26 September 2026. Nobody has seen it on a board for 18 days.
First ever to find it
on Day 119, 16 September 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
OSTIOLAR starts with O and ends with R. Sorted, its letters read AILOORST - 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.
Words that start OSTIOL
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found OSTIOLAR?
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