| formidable opponent | 9.08 | Bush is a formidable opponent. | ||
| formidable challenge | 8.10 | It is a formidable challenge. | ||
| formidable task | 6.58 | A formidable task. | ||
| formidable obstacle | 5.33 | Formidable obstacles. | ||
| formidable competitor | 4.15 | But Krispy Kreme is a formidable competitor. | ||
| formidable force | 3.69 | The wind is a formidable force. | ||
| formidable foe | 2.76 | Both are formidable foes. | ||
| formidable team | 2.76 | OneWorld is fielding a formidable team. | ||
| formidable candidate | 2.70 | He will make a formidable candidate. | ||
| formidable presence | 2.04 | Vulgamore is a formidable presence. | ||
| formidable competition | 1.78 | MobileOne will offer formidable competition. | ||
| formidable opposition | 1.78 | But the plan faces formidable opposition. | ||
| formidable problem | 1.78 | And security remains a formidable problem. | ||
| formidable rival | 1.65 | But it faces formidable rivals. | ||
| formidable power | 1.45 | Truly a sign of formidable power. | ||
| formidable reputation | 1.45 | Cardinal Martini has a formidable reputation for scholarship. | ||
| formidable challenger | 1.38 | The solid cast makes it a formidable challenger. | ||
| formidable hurdle | 1.38 | The winner faces a formidable hurdle. | ||
| formidable barrier | 1.25 | The mountains were a formidable barrier. | ||
| formidable weapon | 1.18 | Noise is a formidable weapon. |