memorable

Synonyms: a-1 big-league bodacious catchy celebrated critical crucial decisive distinguished doozie enduring eventful extraordinary famous great heavy heavyweight historic hot illustrious important impressive indelible interesting lasting major-league meaningful mind-blowing momentous monumental notable observable red-letter remarkable rememberable rubric serious signal something standout striking super surpassing terrible terrific top-drawer unforgettable

Antonyms: forgettable insignificant unimpressive unnoteworthy