Synonyms for Syringa (same or very similar meaning)
WordNet sense 1 (large hardy shrub with showy and strongly fragrant creamy-white flowers in short terminal racemes):
mock orange, Philadelphus coronariusWordNet sense 2 (genus of Old World shrubs or low trees having fragrant flowers in showy panicles: lilacs):
genus SyringaFrom the ODE community, based on WordNetadd/edit