The term 'hard punch' can be described by three crossword solutions: BLOW (4 letters), SLUG (4 letters), and WALLOP (6 letters). A BLOW is a forceful strike with the hand or fist, while a SLUG is a punch that is especially hard and forceful. WALLOP is a verb meaning to hit someone or something with great force. All three words refer to a powerful punch, and together they provide a comprehensive description of the term 'hard punch.'