What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Dumbbell and Barbell Bench Press

Exercises are of different types and obviously, not only the way but exercises machines are also different for different types of exercises. Dumbbell and Barbell are the names of two commonly using exercising tools. In fact, it does not mean that dumbbell and barbell are used for any particular type of exercise; they are used in different types of exercises.