The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ISOBUTYLENE
Definition of ISOBUTYLENE
noun
methylpropene; isobutene
Wiktionary · CC BY-SA
Where it comes from
From iso- + butylene or isobutyl + -ene?
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.
ISOBUTYLENE in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 82, 10 August 2026. The most recent board was Day 99, 27 August 2026. Nobody has seen it on a board for 12 days.
First ever to find it
on Day 82, 10 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ISOBUTYLENE starts with I and ends with E. Sorted, its letters read BEEILNOSTUY - the shape to hunt for when the grid is scrambled. E appears more than once.
Words that start ISOBUTY
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found ISOBUTYLENE?
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 82 - and most players walked straight past it.
Play today's OUTLIER