| arch rival | 6.06 | The two front-runners are arch rivals. | ||
| arch enemy | 2.37 | They are our arch enemies. | ||
| arch foe | 1.38 | Iran bans contact of any kind with Israel, its arch foe. | ||
| arch support | 0.79 | Sandals also tend to lack good arch support. | ||
| arch conservative | 0.26 | They willfully overlook the presence of arch conservatives such as George F. | ||
| arch spandrel | 0.26 | The arch spandrels are decorated by figures of winged victory and personifications of rivers. |