Synonyms of uncooperative

2 Syllables
tough-nut, bullhead
3 Syllables
hardline, contrary, hard-hearted, perverse, unwilling, stiff-necked, self-willed, unpliable, uncheerful
4 Syllables
intractable, disobliging, unobliging, obdurate
5 Syllables
unsupportive, confrontational
6 Syllables
unaccommodating