anodyne, banal, bland, blunt, boring, bromide, cursory, dull, hackneyed, humdrum, inconsequential, insipid, insubstantial, interminable, jejune, laborious, lackluster, lacklustre, monotonous, monotony, mundane, nondescript, pabulum, pedestrian, platitude, prosaic, tedious, tedium, tepid, trite, trivial, unexciting, vacuous, vapid