| Text | Length |
| On a par (with) | 15 |
| On a par in Paris | 17 |
| On a par with | 13 |
| On a par, in Paris | 18 |
| On a par: Fr. | 13 |
| On a par: Prefix | 16 |
| On a pedestal | 13 |
| On a pension: Abbr. | 19 |
| On a pinnacle | 13 |
| On a rampage | 12 |
| On a schooner, say | 18 |
| On a shoestring | 15 |
| On a short leash | 16 |
| On a shuttle, maybe | 19 |
| On a slant: Abbr. | 17 |
| On a slow boat to | 17 |
| On a small scale | 16 |
| On a smaller scale | 18 |
| On a sofa, say | 14 |
| On a Spanish ship | 17 |
| On a spit, say | 14 |
| On a steamer, say | 17 |
| On a streak? | 12 |
| On a tandem, e.g. | 17 |
| On a tight schedule | 19 |
| On a vacation | 13 |
| On a warpath | 12 |
| On a wayward path | 17 |
| On a windjammer | 15 |
| On a winning streak | 19 |
| On a yacht, briefly | 19 |
| On a ___ (raging) | 17 |
| On account (of) | 15 |
| On account of | 13 |
| On again, in a way | 18 |
| On air trucker? | 15 |
| On Alcatraz, e.g. | 17 |
| On all counts | 13 |
| On all sides | 12 |
| On an ad -- basis | 17 |
| On an airplane | 14 |
| On an annual basis | 18 |
| On an ark, e.g. | 15 |
| On an ego trip | 14 |
| On an errand, maybe | 19 |
| On an errand, say | 17 |
| On an even --- | 14 |
| On an even keel | 15 |
| On an even ___ | 14 |
| On an incline | 13 |
| On an ocean journey | 19 |
| On an ocean liner | 17 |
| On an ocean voyage | 18 |
| On an upswing | 13 |
| On an ___ basis | 15 |
| On and after | 12 |
| On and off items | 16 |
| On another planet | 17 |
| On any occasion | 15 |
| On behalf of | 12 |
| On bended ___ | 13 |
| On board direction | 18 |
| On board ship | 13 |
| On both banks of | 16 |
| On both sides | 13 |
| On both sides of | 16 |
| On break, say | 13 |
| On call device | 14 |
| On cat's feet | 17 |
| On clippers? | 12 |
| On cloud nine | 13 |
| On cloud nine? | 14 |
| On dad's side | 17 |
| On deck, on ships | 17 |
| On deck, say | 12 |
| On deep water | 13 |
| On delivery? | 12 |
| On different sides | 18 |
| On disk, say | 12 |
| On drugs, slangily | 18 |
| On easy street | 14 |
| On eBay, e.g. | 13 |
| On edge, as nerves | 18 |
| On edge: Fr. | 12 |
| On even terms | 13 |
| On familiar ground | 18 |
| On fire, as a match | 19 |
| On first impression | 19 |
| On first, maybe | 15 |
| On floppy disk, say | 19 |
| On foot, in France | 18 |
| On foot, in Nice | 16 |
| On foot, in Paris | 17 |
| On foot: Fr. | 12 |
| On good grounds | 15 |
| On good terms | 13 |
| On holiday, say | 15 |
| On horseback | 12 |
| On ice, maybe | 13 |
| On leave, maybe | 15 |
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