Catalytic converter and Convertor

Catalytic converter noun - A converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system.

Convertor and catalytic converter are semantically related. In some cases you can use "Convertor" instead a noun phrase "Catalytic converter".

Convertor noun - A device for changing one substance or form or state into another.

Catalytic converter and convertor are semantically related. Sometimes you can replace phrase "Catalytic converter" with "Convertor", this terms are similar.