The rare daily word game sweeping the globe. Find what's hidden in plain sight.
FLUORIDE
Definition of FLUORIDE
noun
A binary compound of fluorine and another element or radical.
Wiktionary · CC BY-SA
Where it comes from
From fluor(ine) + -ide.
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.
FLUORIDE in OUTLIER
Players have found it on 29 boards so far. 67 players have found it across Outlier's history.
It first turned up on Day 19, 8 June 2026. The most recent board was Day 98, 26 August 2026. It was on the latest finished board.
First found by a player on Day 19, 8 June 2026.
Built from these letters
FLUORIDE starts with F and ends with E. Sorted, its letters read DEFILORU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start FLUORI
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 19
Could you have found FLUORIDE?
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 19 - and most players walked straight past it.
Play today's OUTLIER