| Certain fireworks | 17 |
| Certain first words | 19 |
| Certain fish | 12 |
| Certain fisher | 14 |
| Certain fisherman | 17 |
| Certain fisherman's trap | 28 |
| Certain fishermen | 17 |
| Certain fishing pot | 19 |
| Certain fixation | 16 |
| Certain flag, formally | 22 |
| Certain flair | 13 |
| Certain flake | 13 |
| Certain Flanders river | 22 |
| Certain flat-screen, briefly | 28 |
| Certain flavors. | 16 |
| Certain fledgling | 17 |
| Certain fledglings | 18 |
| Certain flexible attraction | 27 |
| Certain flick | 13 |
| Certain flier | 13 |
| Certain fliers | 14 |
| Certain flies | 13 |
| Certain flights | 15 |
| Certain floor cover | 19 |
| Certain floorers | 16 |
| Certain flower | 14 |
| Certain flower girl | 19 |
| Certain flowering layout | 24 |
| Certain flowering shrub | 23 |
| Certain flowers | 15 |
| Certain fly-catchers: Abbr. | 27 |
| Certain flycatcher | 18 |
| Certain fodder | 14 |
| Certain foil | 12 |
| Certain folk instrument | 23 |
| Certain follow-up | 17 |
| Certain follower's reading | 30 |
| Certain food | 12 |
| Certain food fishes | 19 |
| Certain food in a bowl | 22 |
| Certain foot | 12 |
| Certain foot specialist | 23 |
| Certain football lineup | 23 |
| Certain football pass | 21 |
| Certain football passes | 23 |
| Certain football position | 25 |
| Certain football positions (Abbr.) | 34 |
| Certain football score | 22 |
| Certain footnote | 16 |
| Certain footwear | 16 |
| Certain forced bet | 18 |
| Certain Ford models | 19 |
| Certain Ford, briefly | 21 |
| Certain Ford, for short | 23 |
| Certain Ford, once | 18 |
| Certain Fords | 13 |
| Certain foreign dignitary | 25 |
| Certain foreign leader | 22 |
| Certain foreign leader (Var.) | 29 |
| Certain foreign policy | 22 |
| Certain forerunner of the euro | 30 |
| Certain forest areas | 20 |
| Certain form numbers | 20 |
| Certain form of protest | 23 |
| Certain formalwear, informally | 30 |
| Certain former senior | 21 |
| Certain former soldiers | 23 |
| Certain Formosan bank deposit | 29 |
| Certain forms of protest | 24 |
| Certain fossil fuel | 19 |
| Certain foul balls | 18 |
| Certain foundation | 18 |
| Certain four-sided figures | 26 |
| Certain four-stringers, briefly | 31 |
| Certain four-wheeler, for short | 31 |
| Certain four-year period | 24 |
| Certain fowl | 12 |
| Certain fractions | 17 |
| Certain fractions: Abbr. | 24 |
| Certain fragrant wood | 21 |
| Certain frameworks | 18 |
| Certain frat boy | 16 |
| Certain frat man, for short | 27 |
| Certain fraternal order member | 30 |
| Certain fraternity activity | 27 |
| Certain fraternity chapter | 26 |
| Certain fraternity man, informally | 34 |
| Certain fraternity member, casually | 35 |
| Certain fraternity men | 22 |
| Certain fraud investigator, informally | 38 |
| Certain freak | 13 |
| Certain free radical | 20 |
| Certain free rider | 18 |
| Certain freight shipment | 24 |
| Certain freight train | 21 |
| Certain French cheese | 21 |
| Certain French meat | 19 |
| Certain French oils | 19 |
| Certain French paintings | 24 |
| Certain French wines | 20 |