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"washroom" is also used as a crossword clue. If that's what you saw, the answer is often lavatory (8 letters).
Definitions
a lavatory (particularly a lavatory in a public place)
Word origin
From wash + room in reference to its sinks, but generally used euphemistically outside of Canada and the United States.
Used in a sentence
“Bright, modern offices, washrooms and messrooms are located in the centre block.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Toilet area”8 letters
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