# 1d vs 1st

> English confusable word pair

## The two words

### 1d
*noun · frequency rank #25,647*
Abbreviation of one penny (a coin with the value of 1 pence/penny; 1/240th of a pound, in pre-decimalisation currency, never used for 'one new penny').

### 1st
*adjective · IPA /fɝst/ · frequency rank #1,549*
Abbreviation of first.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/1d-vs-1st