Tour de Force is a French phrase meaning 'a show of strength or skill'. It is often used to describe a remarkable accomplishment or a masterful performance. A MASTERPIECE (11 letters) is an artwork or literary work of outstanding quality and artistry. An EXPLOIT (7 letters) is a brave or daring act, often involving great courage. An ACHIEVEMENT (11 letters) is a successful accomplishment, usually requiring hard work and dedication. A FEAT (4 letters) is an impressive or difficult accomplishment. A GEM (3 letters) is something of great value or beauty. A MASTERSTROKE (12 letters) is a cleverly planned and executed action. All of these words can be used to describe Tour de Force, which is an extraordinary accomplishment or display of skill.