Quickwittednesses is a complex word that can be difficult to find synonyms for. However, there are several words that can be used to describe someone who is quick-witted. These include intelligence, cleverness, agility, sharpness, wit, astuteness, alertness, resourcefulness, and keenness. These terms all suggest a high level of mental acuity and the ability to think quickly and clearly under pressure. They also suggest an adaptable and versatile mind, able to solve problems and make quick decisions. These synonyms can be used interchangeably with quickwittednesses to describe an individual's intellectual and mental capabilities.