The term 'Surprise Greatly' can be expressed in three different ways using crossword solutions: STUN (4 letters), ASTONISH (8 letters), and AMAZE (5 letters). Stunning someone means to shock them, while astonishing them implies that they are overwhelmed with amazement. Amazement is a feeling of wonder or admiration, often caused by something unexpected. Therefore, the term 'Surprise Greatly' can be interpreted as shocking someone to the point of overwhelming them with admiration.