This document outlines key differences in phraseology used in air traffic control communications between the International Civil Aviation Organization (ICAO) and the United States Federal Aviation Administration (FAA). It discusses differences in terminology for air traffic control units, procedures for clearances, wake turbulence separation, use of headings versus tracks, procedures following loss of radio communication, holding patterns, and approach procedures. The document is intended to help pilots learn and understand differences that could impact safety and procedures when flying internationally.