# flue vs fly

> English confusable word pair

## The two words

### flue
*noun · IPA /fluː/ · frequency rank #38,401*
A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).

### fly
*noun · IPA /flaɪ/ · frequency rank #1,827*
Any insect of the order Diptera; characterized by having two wings (except for some wingless species), also called true flies.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/flue-vs-fly