While both are time-based effects, they serve different emotional and functional purposes in audio production.
Instead, you hear a "tail" or a "wash" of sound. Reverb is what makes a voice sound like it’s in a tiled bathroom, a cozy living room, or a massive cathedral. Common Uses for Reverb: echo and reverb
This is why you hear echoes in canyons, large gymnasiums, or across a valley, but you do not hear an echo in your living room. In a small room, the reflected sound returns to your ear so quickly that your brain integrates it with the original sound. This rapid integration is the realm of reverb. While both are time-based effects, they serve different