# HPA vs hub

> English confusable word pair

## The two words

### HPA
*adjective · frequency rank #37,030*
Initialism of hypothalamic-pituitary-adrenal.

### hub
*noun · IPA /hʌb/ · frequency rank #6,254*
The central part, usually cylindrical, of a wheel; the nave.

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