# tumour

> English word · Noun · frequency rank #17,510

## Definitions
1. Commonwealth standard spelling of tumor.

## Etymology
From Middle English tumour, from Old French tumour, from Latin tumor (“swelling”), from tumeō (“bulge, swell”, verb), from Proto-Indo-European *tewh₂- (“to swell”). Related to English thumb.

## Easily confused with
- **tutor** (https://plainspell.com/en/vs/tumour-vs-tutor)
- **tour** (https://plainspell.com/en/vs/tour-vs-tumour)
- **tumor** (https://plainspell.com/en/vs/tumor-vs-tumour)
- **Tudor** (https://plainspell.com/en/vs/tudor-vs-tumour)
- **Timor** (https://plainspell.com/en/vs/timor-vs-tumour)
- **tumblr** (https://plainspell.com/en/vs/tumblr-vs-tumour)

## Common misspellings (8)
`tmuour`, `ttumour`, `tummour`, `tumoru`, `tumourr`, `tumuor`, `tuomur`, `utmour`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/tumour