Synonyms for Restharrow (same or very similar meaning)
WordNet sense 1 (Eurasian plant having loose racemes of pink or purple flowers and spiny stems and tough roots):
rest-harrow, Ononis spinosa
WordNet sense 2 (European woody plant having pink flowers and unifoliate leaves and long tough roots; spreads by underground runners):
Ononis repens
From the ODE community, based on WordNet
add/edit