Depends on the country. Some countries might have different rules for someone visiting family vs. simply being a tourist, and I can see how a "travel" visa might mean "transit". But of course, it's all just guessing without knowing the country / countries involved.

Hey Chris! Just like Ildikó said right above, we need more information to assure a correct answer (of course, considering we know the rules!). but normally, a Travel visa is the same as the Tourist visa: A temporary authorisation to stay in the country as a tourist. To get it, you need to show a flight ticket back to your country, a hotel booking or a letter and money enough as a proof that you can support yourself during the time of your travel. A Visitor visa comes in a different situation, for example, if you are visiting a friend or a family member and want to stay more than the Tourist limited period, then you get this kind of authorisation. Still limited, but extendable if you prove the real and valid reason to stay. I hope this helps!

Yes, I interpret these to be one and the same.