"Whimsicalnesses" is a challenging word to find synonyms for, as it represents a rare and complex personality trait. However, we can describe similar characteristics that also convey a sense of playfulness, creativity, and spontaneity. "Playful attitude" suggests a lightheartedness and optimism that characterizes someone who enjoys life and is often open to new experiences. "Quirkiness" implies a uniqueness and eccentricity that reflects an individual's peculiar interests and habits. "Spontaneity" denotes an unrestrained and impulsive behavior that manifests in a willingness to take risks and embrace the unknown. Ultimately, these synonyms reveal the charming and captivating nature of "whimsicalnesses".