The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CASTLE
Definition of CASTLE
noun
A large residential building or compound that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king. Also, a house or mansion with some of the architectural features of medieval castles.
Wiktionary · CC BY-SA
Where it comes from
From Middle English castle, castel, from late Old English castel, castell (“a town, village”), borrowed from Late Latin castellum (“small camp, fort”), diminutive of Latin castrum (“camp, fort, citadel, stronghold”). Doublet of cashel, castell, castellum, and château. Parallel borrowings (from Late Latin or Old French) are Scots castel, castell (“castle”), West Frisian kastiel (“castle”), Dutch kasteel (“castle”), German Kastell (“castle”), Danish kastel (“citadel”), Swedish kastell (“citadel”), Icelandic kastali (“castle”), Welsh castell. The late Old English word was borrowed from biblical Latin castellum which has been translated as town or village. With the sense of castle, from Anglo-Norman/Old Northern French castel (“castle”), itself from Late Latin castellum (“small camp, fort”) (compare modern French château from Old French chastel). If Latin castrum (“camp, fort, citadel, stronghold”) is from Proto-Indo-European *kat- (“hut, shed”), Latin casa (“cottage, hut”) is related. Possibly related also to Gothic 𐌷𐌴𐌸𐌾𐍉 (hēþjō, “chamber”), Old English heaþor (“restraint, confinement, enclosure, prison”). See also casino, cassock.
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
CASTLE in OUTLIER
Players have found it on 10 boards so far. 19 players have found it across Outlier's history.
It first turned up on Day 11, 31 May 2026. The most recent board was Day 102, 30 August 2026. It was on the latest finished board.
First found by a player on Day 11, 31 May 2026.
Built from these letters
CASTLE starts with C and ends with E. Sorted, its letters read ACELST - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
4 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Also seen on Day 11
Could you have found CASTLE?
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 11 - and most players walked straight past it.
Play today's OUTLIER