| Text | Length |
| Not explicit | 12 |
| Not exposed to weather | 22 |
| Not express | 11 |
| Not expressed | 13 |
| Not expressly stated | 20 |
| Not external | 12 |
| Not extinct | 11 |
| Not extreme | 11 |
| Not extreme: Abbr. | 18 |
| Not fabricated | 14 |
| Not facing one's problems | 29 |
| Not factory-fresh | 17 |
| Not factual | 11 |
| Not faddish | 11 |
| Not Fahr. | 9 |
| Not fail | 8 |
| Not fair | 8 |
| Not fair and balanced | 21 |
| Not fair at all | 15 |
| Not fair, in a way | 18 |
| Not fair? | 9 |
| Not faithful | 12 |
| Not faithful, literally | 23 |
| Not fake | 8 |
| Not fake or phony | 17 |
| Not faked out by | 16 |
| Not fall behind | 15 |
| Not falling for | 15 |
| Not false | 9 |
| Not familiar with | 17 |
| Not family fare | 15 |
| Not family-friendly | 19 |
| Not fancied | 11 |
| Not fanciful | 12 |
| Not fancy | 9 |
| Not fancy at all | 16 |
| Not fancy in the least | 22 |
| Not fancy? | 10 |
| Not fantastic | 13 |
| Not far | 7 |
| Not far (with "a") | 28 |
| Not far apart, as eyes | 22 |
| Not far apart, as the eyes | 26 |
| Not far away | 12 |
| Not far from | 12 |
| Not far from, in poetry | 23 |
| Not far in the future | 21 |
| Not far off | 11 |
| Not far out | 11 |
| Not fare well | 13 |
| Not farmed out | 14 |
| Not fast | 8 |
| Not fat | 7 |
| Not fat, as meat | 16 |
| Not fated | 9 |
| Not fatty | 9 |
| Not faux | 8 |
| Not favorably written up | 24 |
| Not favoring | 12 |
| Not fazed by | 12 |
| Not fearful | 11 |
| Not feeble | 10 |
| Not feel oneself | 16 |
| Not feel so good | 16 |
| Not feel so good. | 17 |
| Not feel well | 13 |
| Not feeling | 11 |
| Not feeling 100 percent | 23 |
| Not feeling perfect | 19 |
| Not feeling put out? | 20 |
| Not feeling so hot | 18 |
| Not feeling too well | 20 |
| Not feeling up ___ | 18 |
| Not feeling very creative | 25 |
| Not feeling well | 16 |
| Not feisty | 10 |
| Not fem. | 8 |
| Not fem. or masc. | 17 |
| Not fem. or neut. | 17 |
| Not feminine: Abbr. | 19 |
| Not fer | 7 |
| Not fer, in Dogpatch | 20 |
| Not feral | 9 |
| Not fertile | 11 |
| Not feverish | 12 |
| Not fickle | 10 |
| Not fiction | 11 |
| Not fictitious | 14 |
| Not field cleanly | 17 |
| Not fighting | 12 |
| Not fighting it | 15 |
| Not figurative | 14 |
| Not fill something all the way, say | 35 |
| Not filled up | 13 |
| Not filleted | 12 |
| Not filleted, as fish | 21 |
| Not filmed | 10 |
| Not final | 9 |
| Not final or absolute | 21 |
| Not final, as a decree | 22 |
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