The rare daily word game sweeping the globe. Find what's hidden in plain sight.
RHEOBASE
Definition of RHEOBASE
noun
The minimum electric current amplitude that results in an action potential.
Wiktionary · CC BY-SA
Where it comes from
From rheo- + base.
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.
RHEOBASE in OUTLIER
Players have found it on 3 boards so far.
It first turned up on Day 68, 27 July 2026. The most recent board was Day 107, 4 September 2026. Nobody has seen it on a board for 4 days.
First ever to find it
on Day 68, 27 July 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
RHEOBASE starts with R and ends with E. Sorted, its letters read ABEEHORS - the shape to hunt for when the grid is scrambled. E appears more than once.
Could you have found RHEOBASE?
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 68 - and most players walked straight past it.
Play today's OUTLIER