The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SPELEOLOGY
Definition of SPELEOLOGY
noun
The scientific study of caves.
Wiktionary · CC BY-SA
Where it comes from
From French spéléologie, coined by Émile Rivière in 1890. The word can be broken down as speleo- + -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.
SPELEOLOGY in OUTLIER
Players have found it on 1 board so far. 12 players have found it across Outlier's history.
It first turned up on Day 76, 4 August 2026. Nobody has seen it on a board for 36 days.
First ever to find it
on Day 76, 4 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SPELEOLOGY starts with S and ends with Y. Sorted, its letters read EEGLLOOPSY - the shape to hunt for when the grid is scrambled. E, L and O appear more than once.
Words that start SPELEO
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found SPELEOLOGY?
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 76 - and most players walked straight past it.
Play today's OUTLIER