mandrake root vs mandrake

mandrake root and mandrake both are nouns.

Word	Noun	Adjective	Verb	Adverb
mandrake root	Yes	No	No	No
mandrake	Yes	No	No	No

As nouns, mandrake root and mandrake are synonyms defined as:

mandrake root and mandrake: the root of the mandrake plant; used medicinally or as a narcotic

mandrake root (noun)	mandrake (noun)
the root of the mandrake plant; used medicinally or as a narcotic	a plant of southern Europe and North Africa having purple flowers, yellow fruits and a forked root formerly thought to have magical powers
	the root of the mandrake plant; used medicinally or as a narcotic