The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PROPENE
Definition of PROPENE
noun
The organic chemical compound propylene. An alkene which is a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C3H6.
Wiktionary · CC BY-SA
Where it comes from
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, PROPENE · 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.
PROPENE in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 151, 18 October 2026. The most recent board was Day 152, 19 October 2026. Nobody has seen it on a board for 15 days.
First ever to find it
on Day 151, 18 October 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PROPENE starts with P and ends with E. Sorted, its letters read EENOPPR - the shape to hunt for when the grid is scrambled. P and E appear more than once.
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 PROPEN
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found PROPENE?
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 151 - and most players walked straight past it.
Play today's OUTLIER