ship
Different types of ships:
- A cruise ship is a luxury ship used for vacations
- A battleship is used for attacking in war
- A cargo ship is used for transporting products
boat
Different types of boats:
- A motorboat is powered by a motor
- A sailboat is powered by the wind
- A rowboat is powered by people pulling in the water with instruments called oars
canoe

They are using oars to move the canoe forward. Also, both are wearing life jackets.
kayak

With a kayak, a double-sided oar is used.
raft

A raft is often inflatable (filled with air)
jet ski
submarine

A submarine travels UNDER the water
anchor

Many ships have an anchor to keep it in the same place in the water
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Image sources: Walter Siegmund, John Carver from geograph.org.uk, Shizhao