In England,the Football is called "soccer"
In spanish,the football is called "fútbol or futbol"
in portuguese,the football is called " futebol"
In french,the football is called "football"
in german,the football is " Fußball."
And i can keep going on and on....
So what that mean is that basically the word "football" is the actual term which is used by the very huge majority of people who love playing it
Or watching it in the world.... so You will be understood and also safe in most countries if you really associate soccer with football....