The rare daily word game sweeping the globe. Find what's hidden in plain sight.

PROMETHIUM

/pɹoʊˈmiːθiəm/10 letters

Definition of PROMETHIUM

noun

A metallic chemical element (symbol Pm) with an atomic number of 61. An atom of this element.

Wiktionary · CC BY-SA

Where it comes from

1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -ium.

Etymology via Wiktionary (CC BY-SA).

Word DNA

How it is built

noun3 syllablescompound-ium

The Word DNA of OUTLIER →

Rarity score
Withheld
Revealed only in play
Tier
Withheld
Find it yourself

OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.

PROMETHIUM in OUTLIER

Players have found it on 1 board so far.

Day 1Day 171
Its one board, across 171 finished boards · taller bars are busier boards
1
Boards found on
140
First board
31
Days since seen

It first turned up on Day 140, 7 October 2026. Nobody has seen it on a board for 31 days.

First ever to find it

oligomer

on Day 140, 7 October 2026 - before anyone else in Outlier's history. See the Pioneers

Built from these letters

PROMETHIUM
10
Letters
4
Vowels
6
Consonants
9
Different letters
2
Longest consonant run
2
Longest vowel run

PROMETHIUM starts with P and ends with M. Sorted, its letters read EHIMMOPRTU - the shape to hunt for when the grid is scrambled. M appears more than once.

Words that start PROMET

Its neighbours in the OUTLIER dictionary - shortest first.

PROMETALPROMETALSPROMETRICPROMETHEUMPROMETHEUMSPROMETHIUMS

Could you have found PROMETHIUM?

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 140 - and most players walked straight past it.

Play today's OUTLIER