Princeton's WordNet

1. mock orange, syringa, Philadelphus coronarius(noun)

   large hardy shrub with showy and strongly fragrant creamy-white flowers in short terminal racemes

2. southern buckthorn, shittimwood, shittim, mock orange, Bumelia lycioides(noun)

   shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit

3. cherry laurel, laurel cherry, mock orange, wild orange, Prunus caroliniana(noun)

   small flowering evergreen tree of southern United States

4. osage orange, bow wood, mock orange, Maclura pomifera(noun)

   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