# TCP vs TDI

> English confusable word pair

## The two words

### TCP
*adjective · frequency rank #24,928*
Initialism of to complete party (followed by total number in group. Code used in OSI to advise an airline that other passengers are travelling with a person but are booked separately)

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

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