Synonyms of dumdum

1 Syllable
slow, dolt, dim, dull, weak
2 Syllables
dummy, dumdums, numbskull, simple, dumbbell, backward, stupid, gorked, dumbo, dopey, touched, sappy, yo-yo, pinhead
3 Syllables
birdbrained, slow-witted, retardo, subnormal, dim-witted, retarded, moronic, half-witted, opaque, clodpate
4 Syllables
lamebrained, imbecile, defective, exceptional, feeble-minded, simple-minded
5 Syllables
underachieving