The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BACKFILL
Definition of BACKFILL
verb
To refill a hole with the material dug out of it.
Wiktionary · CC BY-SA
Where it comes from
From back + fill.
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.
BACKFILL in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 110, 7 September 2026. Nobody has seen it on a board for 3 days.
First ever to find it
on Day 110, 7 September 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
BACKFILL starts with B and ends with L. Sorted, its letters read ABCFIKLL - the shape to hunt for when the grid is scrambled. L appears more than once, including a double letter.
Words that start BACKFI
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found BACKFILL?
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 110 - and most players walked straight past it.
Play today's OUTLIER