Synonyms of defectively

2 Syllables
feebly, meanly, badly
3 Syllables
faultily, ineptly, shabbily, crudely
4 Syllables
inexpertly, blunderingly, erroneously, imperfectly, maladroitly, unskillfully, inferiorly
5 Syllables
abominably, unsuccessfully, incompetently, insufficiently
6 Syllables
inadequately