The rare daily word game sweeping the globe. Find what's hidden in plain sight.
FLUORINE
Definition of FLUORINE
noun
The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.
Wiktionary · CC BY-SA
Where it comes from
From Latin fluor (“flow”) + English -ine. Coined by British chemist Humphry Davy in 1813.
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.
FLUORINE in OUTLIER
Players have found it on 25 boards so far. 48 players have found it across Outlier's history.
It first turned up on Day 17, 6 June 2026. The most recent board was Day 98, 26 August 2026. It was on the latest finished board.
First ever to find it
on Day 17, 6 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
FLUORINE starts with F and ends with E. Sorted, its letters read EFILNORU - 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 17
Could you have found FLUORINE?
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 17 - and most players walked straight past it.
Play today's OUTLIER