# castle vs costly

> English confusable word pair

## The two words

### castle
*noun · IPA /ˈkɑːsəl/ · frequency rank #3,282*
A large residential building or compound that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king. Also, a house or mansion with some of the architectural features of medieval castles.

### costly
*adjective · IPA /ˈkɒst.li/ · frequency rank #7,899*
Of high cost; expensive.

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