Pungent root is a term used to describe three edible roots: radish (6 letters), ONION (5 letters), and horseradish (11 letters). Radishes are small, round root vegetables with a sharp, peppery flavor. Onions are bulb-shaped vegetables with a strong, pungent flavor. Horseradish is a root vegetable with a spicy, pungent taste. All three of these roots have a strong, pungent flavor that adds a unique flavor to dishes.