What is the difference between department and school?

As nouns the difference between department and school is that department is a part, portion, or subdivision while school is a group of fish or a group of marine mammals such as porpoises, dolphins, or whales or school can be (us|canada)  an institution dedicated to teaching and learning; an educational institution. As a verb school is (of fish) to form into, or travel in a school or school can be to educate, teach, or train (often, but not necessarily, in a school).

What is the difference between department and college?

Department is a synonym of college. In context|obsolete|lang=en terms the difference between department and college is that department is (obsolete) act of departing; departure while college is (obsolete) a corporate group; a group of colleagues. As nouns the difference between department and college is that department is a part, portion, or subdivision while college is (obsolete) a corporate group; a group of colleagues.