Roll over is a phrase that is often used to describe a variety of actions. In the context of a crossword puzzle, the solutions RENEW (5 letters) and ASTONISH (8 letters) can be used to describe the phrase. RENEW suggests a sense of renewal or refreshment, while ASTONISH implies a sense of surprise or amazement. Together, these two words can be used to describe the phrase 'roll over' as an action that is both refreshing and surprising.