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

LEAKPROOF

/ˈliːkpɹuf/9 letters

Definition of LEAKPROOF

adjective

Resistant to leaks; hermetic, sound; as of a dry cell battery.

Wiktionary · CC BY-SA

Where it comes from

From leak + -proof.

Etymology via Wiktionary (CC BY-SA).

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.

LEAKPROOF in OUTLIER

Players have found it on 4 boards so far.

Day 1Day 120
Its 4 boards, across 120 finished boards · taller bars are busier boards
4
Boards found on
68
First board
115
Latest board
21
Longest gap, days

It first turned up on Day 68, 27 July 2026. The most recent board was Day 115, 12 September 2026. Nobody has seen it on a board for 5 days.

First found by a player on Day 68, 27 July 2026.

Built from these letters

LEAKPROOF
9
Letters
4
Vowels
5
Consonants
8
Different letters
3
Longest consonant run
2
Longest vowel run

LEAKPROOF starts with L and ends with F. Sorted, its letters read AEFKLOOPR - the shape to hunt for when the grid is scrambled. O appears more than once, including a double letter.

Could you have found LEAKPROOF?

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.

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The OUTLIER card for LEAKPROOFDownload image