Synonyms and related words :
a bit previous, advanced, beforehand, early, far ahead, forward, green, half-baked, half-cocked, hasty, ill-considered, ill-seasoned, ill-timed, immature, improper, impulsive, inappropriate, inauspicious, inconvenient, inexpedient, infelicitous, inopportune, intempestive, intrusive, irrelevant, late, mal a propos, malapropos, mistimed, not firm, off base, out of line, out of phase, out of time, overhasty, oversoon, precipitate, precocious, previous, rushed, soon, too early, too late, too soon, unbefitting, uncrystallized, underdeveloped, undeveloped, unfavorable, unfit, unfitting, unfledged, unfortunate, unhandy, unhappy, unjelled, unlucky, unmatured, unmeditated, unpremeditated, unprepared, unpropitious, unready, unripe, unseasonable, unsuitable, untimely, untoward, wrong