# rigor

> English word · Noun · IPA /ˈɹɪɡɚ/ · frequency rank #26,577

## Definitions
1. US spelling of rigour.
2. A feeling of cold with shivering accompanied by a rise in body temperature.
3. Ellipsis of rigor mortis.

## Etymology
From Old French, from Latin rigor (“stiffness, rigidity, rigor, cold, harshness”), from rigere (“to be rigid”).

## Easily confused with
- **Rio** (https://plainspell.com/en/vs/rigor-vs-rio)
- **riot** (https://plainspell.com/en/vs/rigor-vs-riot)
- **rigs** (https://plainspell.com/en/vs/rigor-vs-rigs)
- **river** (https://plainspell.com/en/vs/rigor-vs-river)
- **roger** (https://plainspell.com/en/vs/rigor-vs-roger)
- **rumor** (https://plainspell.com/en/vs/rigor-vs-rumor)
- **rotor** (https://plainspell.com/en/vs/rigor-vs-rotor)
- **Ringo** (https://plainspell.com/en/vs/rigor-vs-ringo)
- **riser** (https://plainspell.com/en/vs/rigor-vs-riser)
- **ripon** (https://plainspell.com/en/vs/rigor-vs-ripon)
- **ringer** (https://plainspell.com/en/vs/rigor-vs-ringer)
- **rigour** (https://plainspell.com/en/vs/rigor-vs-rigour)
- **rig** (https://plainspell.com/en/vs/rig-vs-rigor)
- **Rico** (https://plainspell.com/en/vs/rico-vs-rigor)
- **Riga** (https://plainspell.com/en/vs/riga-vs-rigor)
- **right** (https://plainspell.com/en/vs/right-vs-rigor)
- **rider** (https://plainspell.com/en/vs/rider-vs-rigor)
- **rigid** (https://plainspell.com/en/vs/rigid-vs-rigor)
- **razor** (https://plainspell.com/en/vs/razor-vs-rigor)

## Common misspellings (7)
`irgor`, `rgior`, `riggor`, `rigorr`, `rigro`, `riogr`, `rrigor`

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