amateurish

from WordNet (r) 3.0 (2006)

amateurish
    adj 1: lacking professional skill or expertise; "a very
           amateurish job"; "inexpert but conscientious efforts";
           "an unskilled painting" [syn: {amateurish}, {amateur},
           {inexpert}, {unskilled}]

from The Collaborative International Dictionary of English v.0.48

Amateurish \Am`a*teur"ish\, a.
   In the style of an amateur; superficial or defective like the
   work of an amateur. -- {Am`a*teur"ish*ly}, adv. --
   {Am`a*teur"ish*ness}, n.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

40 Moby Thesaurus words for "amateurish":
      amateur, clumsy, crude, dabbling, defective, deficient, dilettante,
      dilettantish, faulty, flawed, green, half-assed, half-baked,
      half-cocked, immature, jackleg, raw, sciolistic, semiskilled,
      shallow, smattering, sophomoric, superficial, unaccomplished,
      unbusinesslike, uncoached, unendowed, unfinished, ungifted,
      uninitiated, unpolished, unprepared, unprimed, unprofessional,
      unschooled, unskilled, untalented, untaught, untrained,
      untutored