The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SIERRA
Definition of SIERRA
noun
Alternative letter-case form of Sierra of the ICAO/NATO radiotelephony alphabet.
Wiktionary · CC BY-SA
Where it comes from
Borrowed from Spanish sierra, from Latin serra (“saw”), referring to the saw-tooth profile of the crestline of the range seen from a distance.
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.
SIERRA in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 124, 21 September 2026. Nobody has seen it on a board for 1 day.
First ever to find it
on Day 124, 21 September 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SIERRA starts with S and ends with A. Sorted, its letters read AEIRRS - the shape to hunt for when the grid is scrambled. R appears more than once, including a double letter.
Same letters, different word
4 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start SIERRA
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found SIERRA?
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 124 - and most players walked straight past it.
Play today's OUTLIER