Keep in mind, though, that having multiple words that have nearly the same meaning can help you break up the monotony of using the same word over and over. Sometime you want the effect of repetition: “Use a car, use the bus, use a taxi, but GET TO THAT MEETING!” But if you want to point out the differences between things using them both can underline the contrast: You could use your training in Japanese Martial Arts, while I would utilize Korean techniques.

Small exceptions, but part of what makes the language endlessly fascinating.