The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PION
Definition of PION
noun
Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.
Wiktionary · CC BY-SA
Where it comes from
From pi + -on, as alteration of pi-meson.
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.
PION in OUTLIER
Players have found it on 30 boards so far. 41 players have found it across Outlier's history.
It first turned up on Day 8, 29 May 2026. The most recent board was Day 118, 15 September 2026. It was on the latest finished board.
First found by a player on Day 8, 29 May 2026.
Built from these letters
PION starts with P and ends with N. Sorted, its letters read INOP - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start PION
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 8
Could you have found PION?
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