The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BUTANE
Definition of BUTANE
noun
A hydrocarbon (either of the two isomers of C4H10, n-butane and 2-methylpropane) found in gaseous petroleum fractions.
Wiktionary · CC BY-SA
Where it comes from
IUPAC nomenclature, from but- (“four carbon prefix”) + -ane (“alkane suffix”), the former is derived from the same stem as the foul-smelling carboxylic acid liberated in rancid butter, "butyric acid", hence cognate with butter.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
BUTANE in OUTLIER
Players have found it on 70 boards so far. 282 players have found it across Outlier's history.
It first turned up on Day 7, 28 May 2026. The most recent board was Day 166, 2 November 2026. It was on the latest finished board.
First ever to find it
on Day 7, 28 May 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
BUTANE starts with B and ends with E. Sorted, its letters read ABENTU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Also seen on Day 7
Could you have found BUTANE?
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 7 - and most players walked straight past it.
Play today's OUTLIER