Synonyms for Cowberry (same or very similar meaning)
WordNet sense 1 (low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries):
foxberry, lingberry, lingenberry, lingonberry, Vaccinium vitis-idaea, mountain cranberryWordNet sense 2 (tart red berries similar to American cranberries but smaller):
lowbush cranberryFrom the ODE community, based on WordNetadd/edit