What term should you use when talking about boats?

There are many different kind of boats but still we only use one non specific term: "boat".

Aren't there some more specific ones?
Of couse there are! and here are some:

• Boats are refering for small water crafts (less than 100 ft or 30m)
• Then comes ships which are larger vessels mainly used for commercial purpose
• Also you can speak of famous Yachts
• Motor boats are refering to motor driven boats or different kind of engines
• Finally Sail boats are the ones driven by wind forces.

So now, you might want to use different terms than boat!