| Text | Length |
| Not nice, as a comment | 22 |
| Not nigh | 8 |
| Not Nintendos | 13 |
| Not nixed | 9 |
| Not nobody | 10 |
| Not nodding | 11 |
| Not nodding off | 15 |
| Not nominal | 11 |
| Not non | 7 |
| Not non compos mentis | 21 |
| Not none | 8 |
| Not none but not all | 20 |
| Not normal | 10 |
| Not normal, as a gene | 21 |
| Not normally cast, as votes | 27 |
| Not notched | 11 |
| Not notice | 10 |
| Not noticed | 11 |
| Not nourished | 13 |
| Not nous | 8 |
| Not novel | 9 |
| Not now | 7 |
| Not now or the future | 21 |
| Not now! | 8 |
| Not now, in Mexico | 18 |
| Not now? | 8 |
| Not now—later, perhaps | 29 |
| Not nude | 8 |
| Not numerous | 12 |
| Not nuts | 8 |
| Not nuts or crackers | 20 |
| Not nutso | 9 |
| Not o'er | 12 |
| Not oaks | 8 |
| Not obese in the least | 22 |
| Not object to | 13 |
| Not objective | 13 |
| Not obligated | 13 |
| Not obligated (to) | 18 |
| Not obligatorily | 16 |
| Not oblivious | 13 |
| Not oblivious of | 16 |
| Not oblivious to | 16 |
| Not obscured | 12 |
| Not observed | 12 |
| Not obsolete | 12 |
| Not obstructed | 14 |
| Not obtuse | 10 |
| Not obvious | 11 |
| Not obvious, as feelings | 24 |
| Not Occidental | 14 |
| Not occupied | 12 |
| Not occur to | 12 |
| Not occurring naturally | 23 |
| Not odd | 7 |
| Not odd at all | 14 |
| Not of a party: Abbr. | 21 |
| Not of a piece | 14 |
| Not of sound mind | 17 |
| Not of the church | 17 |
| Not of the clergy | 17 |
| Not of the cloister | 19 |
| Not of the cloth | 16 |
| Not of the rabbinate | 20 |
| Not of this earth | 17 |
| Not of this world | 17 |
| Not off by even a hair | 22 |
| Not off one's rocker? | 25 |
| Not off the rack | 16 |
| Not off-key | 11 |
| Not off-the-rack | 16 |
| Not offering traction, in a way | 31 |
| Not often | 9 |
| Not often observed | 18 |
| Not often seen | 14 |
| Not often seen, to Caesar | 25 |
| Not often: Abbr. | 16 |
| Not ohs | 7 |
| Not old | 7 |
| Not old enough | 14 |
| Not old-school | 14 |
| Not old: Ger. | 13 |
| Not on | 6 |
| Not on all fours | 16 |
| Not on an even keel | 19 |
| Not on any side | 15 |
| Not on base when req. | 21 |
| Not on board ship | 17 |
| Not on board, maybe | 19 |
| Not on course | 13 |
| Not on deck | 11 |
| Not on deck, maybe | 18 |
| Not on deck, perhaps | 20 |
| Not on deck, say | 16 |
| Not on edge | 11 |
| Not on friendly terms | 21 |
| Not on goal, maybe | 18 |
| Not on good terms | 17 |
| Not on good terms (with) | 24 |
| Not on horseback | 16 |
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