The word "sillied" means to act foolishly or to behave in a silly manner. There are several synonyms for "sillied" such as whimsical, playful, lighthearted, goofy, and frivolous. "Whimsical" suggests a playful or capricious nature, while "playful" indicates a joyous and fun-loving attitude. "Lighthearted" implies a carefree and cheerful disposition, "goofy" describes a silly and humorous behavior, and "frivolous" suggests a lack of seriousness. Other synonyms for "sillied" include wacky, zany, and daffy, which denote a fun-loving or crazy behavior. These synonyms can help to enhance the language, tone, and character development in writing, adding more depth and personality to any text.