Words for stubborn:
1. Obstinate - ज़िद्दी
2. Inflexible - अटल
3. Intractable - हठी
4. Adamant - हठी/अटल
5. Headstrong - अड़ियल
6. Rigid - कड़ा
7. Steadfast - दृढ़
8. Hardheaded - कठोर
9. Recalcitrant - आज्ञा न माननेवाला
10. Untoward - हठी
11. Closed - सीमित
12. Opinionated - मनमौजी
Some words like headstrong, steadfast, have a positive connotation. While 'stubborn' has a negative connotation (संकेतार्थ).