21 synonyms for unforgettable such as distinctive, arresting, and catchy. Unforgettable is an adjective, and its antonyms are forgettable and unexceptional.
Arresting, catchy, distinctive, exceptional, extraordinary, fixed in the mind, haunting, impressive, indelible, memorable, not/never to be forgotten, outstanding, persistent, remarkable, signal, significant, singular, special, spectacular, and striking.