The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ISOCHRON
Definition of ISOCHRON
noun
A line on a chart linking rock of the same age (as determined from isotope ratios).
Wiktionary · CC BY-SA
Where it comes from
From iso- + chron.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, ISOCHRON · 2 relatives 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.
ISOCHRON in OUTLIER
Players have found it on 22 boards so far. 20 players have found it across Outlier's history.
It first turned up on Day 41, 30 June 2026. The most recent board was Day 148, 15 October 2026. Nobody has seen it on a board for 8 days.
First ever to find it
on Day 41, 30 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ISOCHRON starts with I and ends with N. Sorted, its letters read CHINOORS - the shape to hunt for when the grid is scrambled. O 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 ISOCHR
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 41
Could you have found ISOCHRON?
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 41 - and most players walked straight past it.
Play today's OUTLIER