By any definition of the word, a "tourist" is a traveler because they have to travel to get to the tourist hot-spots that they prefer. From places made famous by famous books like "Anne of Green Gables" in Prince Edward Island, to the various places made famous by different episodes of "Seinfeld" in New York City, people have to travel to get to the place(s) that they want to tour.
Whereas, a "traveler" doesn't need to tour where they go, where they've been or anywhere in between. All that a traveler is concerned with is getting from point A to point B (and sometimes back again).
Or, another way to look at it is;
A traveler is a person who goes from point A to point B.
A tourist is a traveler who usually has a camera around their neck while going from point A to point B, but stays at point B a lot longer and visits the popular sites that point B is known for..