| It fingers ringers | 18 |
| It finishes on Father's Day | 31 |
| It finishes with a zip | 22 |
| It fires electric darts | 23 |
| It first aired on 8/1/81 | 24 |
| It first circulated in 2000 | 27 |
| It first flew in '47 | 24 |
| It first flew in '48 | 24 |
| It first opened in 1962 | 23 |
| It first sat in 1245 | 20 |
| It fits a thole | 15 |
| It fits all | 11 |
| It fits all, in a phrase | 24 |
| It fits all, so they say | 24 |
| It fits all, sometimes | 22 |
| It fits around a mouth | 22 |
| It fits in a fob | 16 |
| It fits in a lock | 17 |
| It fits in a thole | 18 |
| It fits into a mortise | 22 |
| It fits into a nut | 18 |
| It fits over a light bulb | 25 |
| It fits under a head | 20 |
| It fixes everything | 19 |
| It fizzles | 10 |
| It flaps its wings but can't fly | 36 |
| It flattens as it ages | 22 |
| It fled with the dish | 21 |
| It fled with the spoon | 22 |
| It fled with the spoon, in a nursery rhyme | 42 |
| It fled with the spoon, in a rhyme | 34 |
| It flew its last flight in 2001 | 31 |
| It flies all over London | 24 |
| It flies but has no tail | 24 |
| It flies close to the ground | 28 |
| It flies no more | 16 |
| It flies on demand | 18 |
| It flies on Saturdays only in emergencies | 41 |
| It flies on the first | 21 |
| It flies over the Élysée Palace | 38 |
| It flies through barrels | 24 |
| It floats on water | 18 |
| It flooded Florence in 1966 | 27 |
| It flows across the border of New Mexico and Arizona | 52 |
| It flows along La Rive Gauche | 29 |
| It flows beneath the Ponte Vecchio | 34 |
| It flows by Florence | 20 |
| It flows by the Royal Shakespeare Theatre | 41 |
| It flows for 1,575 miles | 24 |
| It flows for 3,485 miles | 24 |
| It flows from a loch to a firth | 31 |
| It flows from Lake Victoria | 27 |
| It flows from some fountains | 28 |
| It flows in a Burns poem | 24 |
| It flows in bars | 16 |
| It flows in Flanders | 20 |
| It flows in rÃos | 19 |
| It flows in the Ebro | 20 |
| It flows in the Loire | 21 |
| It flows in the Seine | 21 |
| It flows in un rÃo | 21 |
| It flows into Africa's Orange | 33 |
| It flows into Lyon | 18 |
| It flows into Ontario's Georgian Bay [1961] | 47 |
| It flows into the Caspian | 25 |
| It flows into the Columbia | 26 |
| It flows into the Missouri near Jefferson City | 46 |
| It flows into the Rhone | 23 |
| It flows into the Seine | 23 |
| It flows into the Wash | 22 |
| It flows near the Piazzale Michelangelo | 39 |
| It flows past Florence | 22 |
| It flows past Khartoum | 22 |
| It flows past Olten | 19 |
| It flows past Orléans | 24 |
| It flows past Pisa | 18 |
| It flows SSW into the Rhone | 27 |
| It flows through Bonn | 21 |
| It flows through Egypt | 22 |
| It flows through Ethiopia and Sudan | 35 |
| It flows through Florence | 25 |
| It flows through flues | 22 |
| It flows through four capitals | 30 |
| It flows through Gainsborough | 29 |
| It flows through Knottingley | 28 |
| It flows through Metz | 21 |
| It flows through Orsk | 21 |
| It flows through Texas | 22 |
| It flows through the Fertile Crescent | 37 |
| It flows through the Lake of Thun | 33 |
| It flows through the Seine | 26 |
| It flows through the veins of the emotionless | 45 |
| It flows through Turin | 22 |
| It flows through un fleuve | 26 |
| It flows through Utica | 22 |
| It flows through Vienna | 23 |
| It flows to Khartoum | 20 |
| It flows to Oneida Lake | 23 |
| It flows to the Baltic Sea | 26 |
| It flows to the Caspian Sea | 27 |