# insomniac

> English word · Noun · IPA /ɪnˈsɒm.ni.æk/ · frequency rank #45,992

## Definitions
1. One who suffers an inability or difficulty sleeping; a sufferer from insomnia.

## Etymology
From insomnia + -ac.

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

## Common misspellings (13)
`innsomniac`, `inosmniac`, `insmoniac`, `insominac`, `insommniac`, `insomnaic`, `insomniacc`, `insomnica`, `insomnniac`, `insonmiac`, `inssomniac`, `isnomniac`, `nisomniac`

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