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

BIODIESEL

9 letters

Definition of BIODIESEL

noun

Fuel for diesel engines made from renewable organic raw materials, as opposed to fossil hydrocarbons.

Wiktionary · CC BY-SA

Where it comes from

From bio- + diesel.

Etymology via Wiktionary (CC BY-SA).

Word DNA

How it is built

nouncompoundbio-

Same root, BIODIESEL · 1 relative in the game

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.

BIODIESEL in OUTLIER

Players have found it on 13 boards so far. 20 players have found it across Outlier's history.

Day 1Day 164
Its 13 boards, across 164 finished boards · taller bars are busier boards
13
Boards found on
42
First board
164
Latest board
20
Longest gap, days

It first turned up on Day 42, 1 July 2026. The most recent board was Day 164, 31 October 2026. It was on the latest finished board.

First ever to find it

lilc3316

on Day 42, 1 July 2026 - before anyone else in Outlier's history. See the Pioneers

Built from these letters

BIODIESEL
9
Letters
5
Vowels
4
Consonants
7
Different letters
1
Longest consonant run
2
Longest vowel run

BIODIESEL starts with B and ends with L. Sorted, its letters read BDEEIILOS - the shape to hunt for when the grid is scrambled. I and E appear more than once.

Words that start BIODIE

Its neighbours in the OUTLIER dictionary - shortest first.

Could you have found BIODIESEL?

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 42 - and most players walked straight past it.

Play today's OUTLIER