The term 'urge forward' can be expressed in four different ways: IMPEL (5 letters), DRIVE (5 letters), PROD (4 letters), and spuron (6 letters). IMPEL means to compel or force someone to do something, while DRIVE means to motivate or push someone to do something. PROD means to urge or encourage someone to do something, and spuron means to goad or incite someone to do something. All four terms refer to the act of encouraging someone to take action.