| Text | Length |
| FBI employees | 13 |
| FBI force, slangily | 19 |
| FBI guys, e.g. | 14 |
| FBI head Robert | 15 |
| FBI identifier | 14 |
| FBI investigations | 18 |
| FBI investigator | 16 |
| FBI investigators | 17 |
| FBI lab material | 16 |
| FBI lab sample | 14 |
| FBI operative | 13 |
| FBI operatives | 14 |
| FBI personnel | 13 |
| FBI statistic | 13 |
| FBI title: Abbr. | 16 |
| FBI worker, briefly | 19 |
| FBI worker: Abbr. | 17 |
| FBI's guys | 14 |
| FBI, for one | 12 |
| FBI, French-style | 17 |
| FCC concerns | 12 |
| FCC licensee | 12 |
| FD&C Blue No. 2 | 19 |
| FDA and NFL, e.g. | 17 |
| FDA component | 13 |
| FDA guideline | 13 |
| FDA suggestion | 14 |
| FDIC concern | 12 |
| FDR / ___ / DDE | 15 |
| FDR affliction | 14 |
| FDR biographer | 14 |
| FDR brainchild | 14 |
| FDR broadcast | 13 |
| FDR cabinet member | 18 |
| FDR creation | 12 |
| FDR Drive site | 14 |
| FDR follower | 12 |
| FDR home loan gp. | 17 |
| FDR home loan org. | 18 |
| FDR initiative | 14 |
| FDR is on it | 12 |
| FDR loan org. | 13 |
| FDR opponent Landon | 19 |
| FDR power program | 17 |
| FDR power project | 17 |
| FDR predecessor | 15 |
| FDR successor | 13 |
| FDR's canine | 16 |
| FDR's coin | 14 |
| FDR's conflict | 18 |
| FDR's dog | 13 |
| FDR's follower | 18 |
| FDR's last VP | 17 |
| FDR's mate | 14 |
| FDR's mom | 13 |
| FDR's mother | 16 |
| FDR's pet | 13 |
| FDR's place | 15 |
| FDR's pooch | 15 |
| FDR's Scottie | 17 |
| FDR's successor | 19 |
| FDR's terrier | 17 |
| FDR, HST, etc. | 14 |
| FDR, JFK or LBJ | 15 |
| FDR-DDE connection | 18 |
| Fe antecedent | 13 |
| Fe or Ana preceder | 18 |
| Fe or Catalina | 14 |
| Fe, Ag, Au, etc. | 16 |
| Fe, chemically | 14 |
| Fe, fi, fo, fum | 15 |
| Fe, in chemistry | 16 |
| Fe, in Frankfurt | 16 |
| Fe, to a chemist | 16 |
| Fe, to chemists | 15 |
| Fe, to scientists | 17 |
| Fe2 O3, e.g. | 12 |
| Fealty swearers | 15 |
| Fear and Horn | 13 |
| Fear and wonder | 15 |
| Fear big-time | 13 |
| Fear element | 12 |
| Fear greatly | 12 |
| Fear indicator | 14 |
| Fear induces it | 15 |
| Fear intensely | 14 |
| Fear of blushing | 16 |
| Fear of fire | 12 |
| Fear of heights | 15 |
| Fear of many | 12 |
| Fear of open spaces | 19 |
| Fear of ridicule | 16 |
| Fear of strangers | 17 |
| Fear of the dark | 16 |
| Fear of thinking | 16 |
| Fear or hate, e.g. | 18 |
| Fear or Horn | 12 |
| Fear or loathing | 16 |
| Fear reaction | 13 |
| Fear, and then some | 19 |
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