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

INFRASOUND

10 letters

Definition of INFRASOUND

noun

Sound waves having a frequency below the human audible range (below about 20 Hz).

Wiktionary · CC BY-SA

Where it comes from

From infra- + sound.

Etymology via Wiktionary (CC BY-SA).

Word DNA

How it is built

nouncompoundinfra-

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.

INFRASOUND in OUTLIER

Players have found it on 1 board so far.

Day 1Day 139
Its one board, across 139 finished boards · taller bars are busier boards
1
Boards found on
132
First board
7
Days since seen

It first turned up on Day 132, 29 September 2026. Nobody has seen it on a board for 7 days.

First ever to find it

josesia

on Day 132, 29 September 2026 - before anyone else in Outlier's history. See the Pioneers

Built from these letters

INFRASOUND
10
Letters
4
Vowels
6
Consonants
9
Different letters
3
Longest consonant run
2
Longest vowel run

INFRASOUND starts with I and ends with D. Sorted, its letters read ADFINNORSU - the shape to hunt for when the grid is scrambled. N appears more than once.

Words that start INFRAS

Its neighbours in the OUTLIER dictionary - shortest first.

INFRASONICINFRASOUNDSINFRASPECIFICINFRASTRUCTUREINFRASTRUCTURES

Could you have found INFRASOUND?

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 132 - and most players walked straight past it.

Play today's OUTLIER

Share INFRASOUND

The OUTLIER card for INFRASOUNDDownload image