Synonyms of disappointing

1 Syllable
lame
2 Syllables
seamier, failing, wanting, woeful, seamy, plaguy, bitter, punker
3 Syllables
displeasing, inferior, mediocre, unpleasant, frustrating, vexatious, unhappy, depressing
4 Syllables
distasteful, disconcerting, disagreeable, insufficient, unrewarding, regrettable, unsatisfying, unfulfilling, discouraging, disheartening
5 Syllables
demoralizing, uninteresting, inadequate, ineffective
6 Syllables
unsatisfactory, dissatisfactory