In 1999, John went to Disney world for vacation. In this phrase the nouns would be "john" and "Disney world". But would vacation be considered a noun to??

2 answers

Yes, "vacation" is a noun, too. And it should be "Disney World" (both d and w capitalized) because it's a proper noun (the name of a specific place).
Yes. Vacation is a thing and therefore is a noun.

Also -- 1999 is a noun. It's the object of the preposition "in."