The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PETROLEUMS
Definition of PETROLEUMS
noun
plural of petroleum
noun
A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under the Earth's surface.
Wiktionary · CC BY-SA
Word DNA
PETROLEUMS inherits its ancestry from its root, PETROLEUM.
Line of descent
- Latin
- English
One recorded step before English.
Deepest traced root
1st
of 59 source languages in OUTLIER
30.7%
of traced words share this origin (23,981)
branch · 30.7% of traced words
How it is built
Same root, PETROLEUM · 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.
PETROLEUMS in OUTLIER
Players have found it on 18 boards so far. 20 players have found it across Outlier's history.
It first turned up on Day 37, 26 June 2026. The most recent board was Day 158, 25 October 2026. It was on the latest finished board.
First ever to find it
on Day 37, 26 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PETROLEUMS starts with P and ends with S. Sorted, its letters read EELMOPRSTU - the shape to hunt for when the grid is scrambled. E appears 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 PETROL
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 37
Could you have found PETROLEUMS?
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 37 - and most players walked straight past it.
Play today's OUTLIER