WordNet sense 1 (large hardy shrub with showy and strongly fragrant creamy-white flowers in short terminal racemes):

syringa, Philadelphus coronarius

WordNet sense 2 (shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit):

shittim, shittimwood, southern buckthorn, Bumelia lycioides

WordNet sense 3 (small flowering evergreen tree of southern United States):

cherry laurel, laurel cherry, Prunus caroliniana, wild orange

WordNet sense 4 (small shrubby deciduous yellowwood tree of south central United States having spines, glossy dark green leaves and an inedible fruit that resembles an orange; its hard orange-colored wood used for bows by native Americans; frequently planted as boundary hedge):

osage orange, bow wood, Maclura pomifera