rest-harrow vs Ononis spinosa

rest-harrow and Ononis spinosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
rest-harrow	Yes	No	No	No
Ononis spinosa	Yes	No	No	No

As nouns, rest-harrow and Ononis spinosa are synonyms defined as:

rest-harrow and Ononis spinosa: Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots

Other synonyms of rest-harrow include restharrow.

rest-harrow (noun)	Ononis spinosa (noun)
European woody plant having pink flowers and unifoliate leaves and long tough roots; spreads by underground runners	Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots
Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots