Synonyms for Cusk (same or very similar meaning)
WordNet sense 1 (large edible marine fish of northern coastal waters; related to cod):
torsk, Brosme brosmeWordNet sense 2 (elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth):
eelpout, burbot, ling, Lota lotaFrom the ODE community, based on WordNetadd/edit