In the United States, the words ‘school’, ‘college’, and ‘university’ are used interchangeably in speech when referring to higher education institutions. Out of the three, ‘college’ is the most frequently used one. Teachers, parents and students use it to refer to their undergraduate or graduate/postgraduate studies and institutions.In America, it’s more common to hear ‘I’m going to college’ or ‘college students’ than ‘I’m going to university’, which is something you’re likely to hear in Europe.