# sleepiness

> English word · Noun · frequency rank #49,638

## Definitions
1. The property of being sleepy.

## Etymology
From sleepy + -ness.

## Easily confused with
- **sleepless** (https://plainspell.com/en/vs/sleepiness-vs-sleepless)

## Common misspellings (13)
`lseepiness`, `selepiness`, `sleeipness`, `sleepienss`, `sleepines`, `sleepinness`, `sleepinses`, `sleepniess`, `sleeppiness`, `slepeiness`, `slepiness`, `slleepiness`, `ssleepiness`

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