Synonyms and related words :
disregardful, forgetful, functionless, heedless, in disrepair, inapplicable, inconsiderate, inoperable, inoperative, mindless, nonfunctional, nonutilitarian, otiose, out of order, out of whack, respectless, thoughtless, unaccommodating, uncomplaisant, unconducive, uncooperative, unemployable, unfit, unheedful, unmindful, unobliging, unsuitable, unthinking, unthoughtful, unusable, unworkable