# TOS vs tra

> English confusable word pair

## The two words

### TOS
*noun · IPA /tiː əʊ ɛs/ · frequency rank #19,720*
Initialism of terms of service.

### tra
*noun · frequency rank #25,622*
Synonym of iridescent shark (“a shark catfish of species Pangasianodon hypophthalmus”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/tos-vs-tra