Synonyms for Twinberry (same or very similar meaning)
WordNet sense 1 (shrubby honeysuckle with purple flowers; western North America):
Lonicera involucrataWordNet sense 2 (creeping woody plant of eastern North America with shiny evergreen leaves and scarlet berries):
boxberry, partridgeberry, Mitchella repensFrom the ODE community, based on WordNetadd/edit