The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PETROLOGY
Definition of PETROLOGY
noun
The study of the origin, composition and structure of rock.
Wiktionary · CC BY-SA
Where it comes from
From petro- + -logy.
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.
PETROLOGY in OUTLIER
Players have found it on 10 boards so far. 14 players have found it across Outlier's history.
It first turned up on Day 36, 25 June 2026. The most recent board was Day 100, 28 August 2026. Nobody has seen it on a board for 2 days.
First ever to find it
on Day 36, 25 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PETROLOGY starts with P and ends with Y. Sorted, its letters read EGLOOPRTY - the shape to hunt for when the grid is scrambled. O appears more than once.
Words that start PETROL
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 36
Could you have found PETROLOGY?
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 36 - and most players walked straight past it.
Play today's OUTLIER