horseradish vs Armoracia rusticana

horseradish and Armoracia rusticana both are nouns.

Word	Noun	Adjective	Verb	Adverb
horseradish	Yes	No	No	No
Armoracia rusticana	Yes	No	No	No

As nouns, horseradish and Armoracia rusticana are synonyms defined as:

horseradish and Armoracia rusticana: coarse Eurasian plant cultivated for its thick white pungent root

Other synonyms of horseradish include horse radish, red cole.

horseradish (noun)	Armoracia rusticana (noun)
grated horseradish root	coarse Eurasian plant cultivated for its thick white pungent root
coarse Eurasian plant cultivated for its thick white pungent root
the root of the horseradish plant; it is grated or ground and used for seasoning