# TDI vs TSA

> English confusable word pair

## The two words

### TDI
*noun · frequency rank #49,091*
Abbreviation of toluene diisocyanate.

### TSA
*name · frequency rank #18,720*
Initialism of Transportation Security Administration.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/tdi-vs-tsa