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

SEPTARIUM

/sɛpˈtɛəɹi.əm/9 letters

Definition of SEPTARIUM

noun

A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals.

Wiktionary · CC BY-SA

Where it comes from

From Latin saeptum (“inclosure, partition”) + -arium.

Etymology via Wiktionary (CC BY-SA).

Word DNA

Line of descent

  1. Latin
  2. English

One recorded step before English.

Latin

Deepest traced root

1st

of 59 source languages in OUTLIER

30.7%

of traced words share this origin (23,981)

Italic

branch · 30.7% of traced words

How it is built

noun4 syllablescompound-arium

Same root, SEPTARIUM · 1 relative in the game

Every Latin word → · 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.

SEPTARIUM in OUTLIER

Players have found it on 3 boards so far.

Day 1Day 157
Its 3 boards, across 157 finished boards · taller bars are busier boards
3
Boards found on
91
First board
120
Latest board
17
Longest gap, days

It first turned up on Day 91, 19 August 2026. The most recent board was Day 120, 17 September 2026. Nobody has seen it on a board for 37 days.

First found by a player on Day 108, 5 September 2026.

Built from these letters

SEPTARIUM
9
Letters
4
Vowels
5
Consonants
9
Different letters
2
Longest consonant run
2
Longest vowel run

SEPTARIUM starts with S and ends with M. Sorted, its letters read AEIMPRSTU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.

Words that start SEPTAR

Its neighbours in the OUTLIER dictionary - shortest first.

Could you have found SEPTARIUM?

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 91 - and most players walked straight past it.

Play today's OUTLIER