THESAURUS
unmatured
a bit previous, a novice at, a stranger to, advanced, callow, far ahead, forward, fresh, green, green as grass, half-baked, half-cocked, hasty, ignorant, ill-considered, immature, impulsive, inexperienced, new to, not firm, overhasty, oversoon, precipitate, precocious, premature, previous, raw, rushed, too early, too soon, unaccustomed to, unacquainted with, unconversant, unconversant with, uncrystallized, undeveloped, unexperienced, unfamiliar with, unfledged, uninitiated in, unjelled, unmeditated, unpracticed, unpracticed in, unpremeditated, unprepared, unripe, unseasoned, unskilled in, untimely, untried, unused to, unversed, unversed in
