The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ISOPACH
Definition of ISOPACH
noun
A line on a chart joining parts of a stratigraphic unit that have the same thickness; an isopachous line.
Wiktionary · CC BY-SA
Where it comes from
From iso- + Ancient Greek παχύς (pakhús, “thick”) (see pachy-).
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.
ISOPACH in OUTLIER
Players have found it on 3 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 108, 5 September 2026. Nobody has seen it on a board for 12 days.
First ever to find it
on Day 96, 24 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ISOPACH starts with I and ends with H. Sorted, its letters read ACHIOPS - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start ISOPAC
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found ISOPACH?
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 72 - and most players walked straight past it.
Play today's OUTLIER