How does the word curve differs from bend?

"Curve" and "bend" are sometimes used to mean similar things, yet both Words have slightly different applications. "Curve" usually describes a smooth, even arching of a line. It often refers to something intentional (usually "bend" is used to describe something which was done accidentally such as in "I bent the hood of my car"). "Curve" is usually not used as a verb, whereas "bend" usually is. Example: "He bent the iron bar". Curve is used more often as a noun. Curve and bend can be used to describe similar things under limited contexts such as "There was a bend (or curve) in the road".