Synonyms for Buffalo Nut (same or very similar meaning)
WordNet sense 1 (oily drupaceous fruit of rabbitwood):
elk nut, oil nutWordNet sense 2 (shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes):
rabbitwood, Pyrularia puberaFrom the ODE community, based on WordNetadd/edit