# H1N1

> English word · Noun · frequency rank #38,874

## Definitions
1. A strain of influenza, the most common cause of flu in humans; also the strain responsible for swine flu.

## Etymology
The strain classified as containing hemagglutinin type 1, and neuraminidase type 1.

## Easily confused with
- **hn** (https://plainspell.com/en/vs/h1n1-vs-hn)
- **han** (https://plainspell.com/en/vs/h1n1-vs-han)
- **hon** (https://plainspell.com/en/vs/h1n1-vs-hon)
- **hen** (https://plainspell.com/en/vs/h1n1-vs-hen)
- **hun** (https://plainspell.com/en/vs/h1n1-vs-hun)
- **hin** (https://plainspell.com/en/vs/h1n1-vs-hin)
- **hand** (https://plainspell.com/en/vs/h1n1-vs-hand)
- **hang** (https://plainspell.com/en/vs/h1n1-vs-hang)
- **hong** (https://plainspell.com/en/vs/h1n1-vs-hong)
- **hunt** (https://plainspell.com/en/vs/h1n1-vs-hunt)
- **hung** (https://plainspell.com/en/vs/h1n1-vs-hung)
- **hint** (https://plainspell.com/en/vs/h1n1-vs-hint)
- **Hans** (https://plainspell.com/en/vs/h1n1-vs-hans)
- **Hank** (https://plainspell.com/en/vs/h1n1-vs-hank)
- **hind** (https://plainspell.com/en/vs/h1n1-vs-hind)
- **Hana** (https://plainspell.com/en/vs/h1n1-vs-hana)
- **hone** (https://plainspell.com/en/vs/h1n1-vs-hone)
- **hunk** (https://plainspell.com/en/vs/h1n1-vs-hunk)
- **honk** (https://plainspell.com/en/vs/h1n1-vs-honk)
- **Huns** (https://plainspell.com/en/vs/h1n1-vs-huns)

## Common misspellings (5)
`1hn1`, `h11n`, `h1nn1`, `hh1n1`, `hn11`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/h1n1