Rous
4 lettersnounrareUpdated June 2026
Definition
The surname of the American pathologist Peyton Rous, who discovered tumour-causing viruses and was awarded the Nobel Prize in Physiology or Medicine.
“The Rous sarcoma virus, named after Peyton Rous, was the first tumour virus to be identified.”
Word Game Tips
Wordle
Four very common letters R, O, U, S, all appear frequently in Wordle solutions, making this a useful probe word.
Scrabble
Worth 4 points. Valid in competitive Scrabble, the S can alternatively hook onto other words ending in ROU.
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Change a single letter of “rous” to make these 4-letter words — useful for Wordle and crossword clues.
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5-letter words you can spell by adding one letter to “rous”.
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