Synonyms of subnormal

1 Syllable
mean, plain, slight, base, weak
2 Syllables
shoddy, lowly, shabby, lacking, scanty, dwarfed, numbskull, subpar, humble, trifling, modest, rotten, trivial, gorked, paltry, sorry, sparse, faulty, common, worthless, skimpy, crude, feeble, dumdum, lagging, meager
3 Syllables
pitiable, pitiful, inferior, mediocre, niggardly, exiguous, second-rate, low-grade, substandard, imperfect, retardo, valueless, reduced, retarded
4 Syllables
contemptible, incomplete, defective, ordinary, insufficient, miserable, simple-minded
5 Syllables
insignificant, underachieving, subordinate, subalternate, diminutive, unprogressive
6 Syllables
unsatisfactory, underaverage