If I am visiting Nassua, New Provindence Island, San Juan Puerto Rico, and Aruba and I technically visiting the Caribbean islands or the West Indies ?

Sorry am I visiting the caribbean or the west indies ? Spellcheck spellcheck

Google is your friend. Proper spelling is also essential.

They're the same thing. The difference is if you are going to the Greater Antilles or Lesser Antilles. But that doesn't really matter either.

West Indies - MSN Encarta

Enjoy your trip - you're going to some really beautiful islands!