The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PROTIUMS
Definition of PROTIUMS
noun
plural of protium
noun
The lightest and most common isotope of hydrogen, having a single proton and no neutrons: 11H. It is the only stable nuclide with no neutrons.
Wiktionary · CC BY-SA
Word DNA
PROTIUMS inherits its ancestry from its root, PROTIUM.
Line of descent
- Ancient Greek
- English
One recorded step before English.
Deepest traced root
3rd
of 59 source languages in OUTLIER
12.4%
of traced words share this origin (10,302)
branch · 12.4% of traced words
How it is built
Same root, PROTIUM · 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.
PROTIUMS in OUTLIER
Players have found it on 6 boards so far.
It first turned up on Day 80, 8 August 2026. The most recent board was Day 143, 10 October 2026. Nobody has seen it on a board for 25 days.
First ever to find it
on Day 80, 8 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PROTIUMS starts with P and ends with S. Sorted, its letters read IMOPRSTU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Could you have found PROTIUMS?
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 80 - and most players walked straight past it.
Play today's OUTLIER