Synonyms for Toothbrush Tree (same or very similar meaning)
WordNet sense 1 (glabrous or pubescent evergreen shrub or tree of the genus Salvadora; twigs are fibrous and in some parts of the world are bound together in clusters and used as a toothbrush; shoots are used as camel fodder; plant ash provides salt):
mustard tree, Salvadora persicaFrom the ODE community, based on WordNetadd/edit