Education Terms used in USA

University vs. college
In the US, the terms 'university' and 'college' are often used synonymously. Both grant degrees and can be either private or public. Generally, universities tend to be larger than colleges (in terms of student population). Colleges usually only grant undergraduate (bachelor's) degrees, while universities grant bachelor's, master's, and doctoral degrees. Community colleges, however, offer two-year associate degrees as well as technical or vocational programmes.

Graduate vs. postgraduate
In the US, the term 'graduate' is used for master's and PhD studies (this is the equivalent of postgraduate which is used in the UK). Commonly known as ‘grad school', these institutions award master's and doctoral degrees and other graduate qualifications and professional degrees.