The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ISOTHERMAL
Definition of ISOTHERMAL
adjective
Of or pertaining to a process that takes place at constant temperature
Wiktionary · CC BY-SA
Where it comes from
From iso- + thermal or isotherm + -al.
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.
ISOTHERMAL in OUTLIER
Players have found it on 17 boards so far. 14 players have found it across Outlier's history.
It first turned up on Day 14, 3 June 2026. The most recent board was Day 102, 30 August 2026. It was on the latest finished board.
First found by a player on Day 14, 3 June 2026.
Built from these letters
ISOTHERMAL starts with I and ends with L. Sorted, its letters read AEHILMORST - 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 ISOTHE
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 14
Could you have found ISOTHERMAL?
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 14 - and most players walked straight past it.
Play today's OUTLIER