Synonyms and related words :
amidships, average, banal, betwixt and between, central, common, core, dull, equatorial, equidistant, fair, fair to middling, fairish, halfway, indifferent, inferior, insipid, interior, intermediary, intermediate, lackluster, mean, medial, median, mediocre, mediterranean, medium, mesial, mezzo, mid, middle, middle-of-the-road, middlemost, midland, midmost, midships, midway, moderate, modest, namby-pamby, normal, nuclear, of a kind, of a sort, of sorts, ordinary, passable, poor, respectable, routine, second-rate, so-so, standard, tedious, tolerable, usual, vapid, wishy-washy