| stubborn(adjective, characteristic, quality, determined, resolute) |
| adamantine(adjective, determined, resolute, uncompromising, unshakeable) |
| intransigent(adjective, determined, resolute, uncompromising, unshakeable) |
| unrelenting(adjective, determined, resolute, uncompromising, unshakeable) |
| adamant(adjective, determined, resolute, uncompromising, unshakeable) |
| incredulous(adjective, incredulity) |
| skeptical(adjective, incredulity) |
| suspicious(adjective, incredulity) |
| bullheaded(adjective, determined, resolute, uncompromising, unshakeable) |
| cynical(adjective, incredulity) |
| disposed to doubt(expression, idiom, incredulity) |
| distrustful(adjective, incredulity) |
| dogged(adjective, determined, resolute, uncompromising, unshakeable) |
| hard(adjective, determined, resolute, uncompromising, unshakeable) |
| hard-nosed(adjective, determined, resolute, uncompromising, unshakeable) |
| hard of belief(expression, idiom, incredulity) |
| hardened(adjective, determined, resolute, uncompromising, unshakeable) |
| hardheaded(adjective, determined, resolute, uncompromising, unshakeable) |
| headstrong(adjective, determined, resolute, uncompromising, unshakeable) |
| immovable(adjective, determined, resolute, uncompromising, unshakeable) |