Synonyms for Horseradish (same or very similar meaning)
WordNet sense 1 (the root of the horseradish plant; it is grated or ground and used for seasoning):
horseradish rootWordNet sense 2 (coarse Eurasian plant cultivated for its thick white pungent root):
Armoracia rusticana, red coleFrom the ODE community, based on WordNetadd/edit