Synonyms and related words :
blah, broken-record, commonplace, drearisome, dreary, dry, dryasdust, dull, dusty, everlasting, harping, humdrum, invariable, jog-trot, long-winded, monotonous, ordinary, prolix, prosaic, singsong, tedious, treadmill, unamusing, unenjoyable, unentertaining, unexceptional, unexciting, unfunny, uninteresting, unnoteworthy, unvarying, unwitty