The rare daily word game sweeping the globe. Find what's hidden in plain sight.
THERMOS
Definition of THERMOS
noun
A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents
Wiktionary · CC BY-SA
Where it comes from
Genericization of the trademark Thermos, from Ancient Greek θερμός (thermós, “warm”). Possibly related to English warm.
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Ancient Greek
- English
One recorded step before English.
Deepest traced root
2nd
of 59 source languages in OUTLIER
12.6%
of traced words share this origin (3,724)
branch · 12.6% of traced words
How it is built
Same root, THERMO · 1 relative in the game
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
THERMOS in OUTLIER
Players have found it on 37 boards so far. 46 players have found it across Outlier's history.
It first turned up on Day 8, 29 May 2026. The most recent board was Day 150, 17 October 2026. Nobody has seen it on a board for 1 day.
First found by a player on Day 8, 29 May 2026.
Built from these letters
THERMOS starts with T and ends with S. Sorted, its letters read EHMORST - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
2 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start THERMO
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found THERMOS?
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