Deja vu(excuse me for the missing accent mark) is as the name mean, having a feeling of seeing a new thing or hearing a new conversation as if it has happened before. But the catch is, it hasn't! So putting it simply, nostalgia is about experienced memories, while deja vu is about inexperienced ones. read more
As nouns the difference between dejavu and nostalgia is that dejavu is while nostalgia is a longing for home or familiar surroundings; homesickness. read more