The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ISOTOPE
Definition of ISOTOPE
noun
Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a different mass number.
Wiktionary · CC BY-SA
Where it comes from
From iso- (“equal”) + -tope (“place”), because the different isotopes of an element always occupy the same place in the periodic table. The term was coined by Scottish doctor Margaret Todd in 1909 and first used publicly on February 27, 1913 by English chemist Frederick Soddy.
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.
ISOTOPE in OUTLIER
Players have found it on 30 boards so far. 48 players have found it across Outlier's history.
It first turned up on Day 7, 28 May 2026. The most recent board was Day 100, 28 August 2026. Nobody has seen it on a board for 2 days.
First found by a player on Day 7, 28 May 2026.
Built from these letters
ISOTOPE starts with I and ends with E. Sorted, its letters read EIOOPST - the shape to hunt for when the grid is scrambled. O appears more than once.
Words that start ISOTOP
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 7
Could you have found ISOTOPE?
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