Fusion reactor and Nuclear reactor

Fusion reactor noun - A nuclear reactor that uses controlled nuclear fusion to generate energy.

Nuclear reactor and fusion reactor are semantically related. In some cases you can use "Nuclear reactor" instead a noun phrase "Fusion reactor".

Nuclear reactor noun - (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements.

Fusion reactor and nuclear reactor are semantically related. Sometimes you can replace phrase "Fusion reactor" with "Nuclear reactor", this phrases are similar.