Synonyms of unforgettable

1 Syllable

great

2 Syllables

famous, doozie, super, lasting, catchy

3 Syllables

enduring, important, notable, eventful, illustrious, historic, meaningful

4 Syllables

monumental, exceptional, significant, indelible, remembered, noteworthy, distinguished, memorable, remarkable

5 Syllables

inexpungible, inextirpable, ineffaceable, inerasable, extraordinary, rememberable