| In-line skate part | 18 |
| In-line skaters | 15 |
| In-line skates, for short | 25 |
| In-line skating gear | 20 |
| In-N-Out offering | 17 |
| In-of connector | 15 |
| In-of link | 10 |
| In-people | 9 |
| In-person, as an interview | 26 |
| In-Seine features | 17 |
| In-sickness-and-in-health words | 31 |
| In-state opponent of a 'Cane | 32 |
| In-the-know managers | 20 |
| In-the-money finishers | 22 |
| In-the-neighborhood phrase | 26 |
| In-the-news cartel | 18 |
| In-things | 9 |
| In-tray delivery | 16 |
| In-tray item | 12 |
| In-way link | 11 |
| In-your-face | 12 |
| In-your-face '50s-'60s talk show host Joe | 49 |
| In-your-face challenge | 22 |
| In-your-face problem? | 21 |
| In-your-face sales tactic | 25 |
| In-your-face types, in a "Seinfeld" episode | 53 |
| In-___ fertilization | 20 |
| In-___-face (aggressive) | 24 |
| In/out device for a pooch | 25 |
| Ina in films | 12 |
| Ina of Food Network's "Barefoot Contessa" | 55 |
| Ina of stage | 12 |
| Ina of stage and screen | 23 |
| Inability to appreciate music | 29 |
| Inability to appreciate R.E.M.? | 31 |
| Inability to be moved | 21 |
| Inability to distinguish different pitches | 42 |
| Inability to feel pain | 22 |
| Inability to get A's or B's? | 36 |
| Inability to go when others are around | 38 |
| Inability to make good pitches? | 31 |
| Inability to name everyday objects | 34 |
| Inability to read | 17 |
| Inability to recall the names of objects | 40 |
| Inability to recognize and name objects | 39 |
| Inability to see Fido's neckwear? | 37 |
| Inability to see flattery? | 26 |
| Inability to smell | 18 |
| Inability to speak | 18 |
| Inability to stay focused, briefly | 34 |
| Inability to stop building castle towers at inappropriate moments? | 66 |
| Inability to tell A from B, e.g. | 32 |
| Inaccessibility | 15 |
| Inaccessible place | 18 |
| Inaccuracy | 10 |
| Inaccurate | 10 |
| Inaccurate animal doctor? | 25 |
| Inaccurate info on many online dating profiles | 46 |
| Inaccurate plus | 15 |
| Inaccurate verb in a toy's name | 35 |
| Inaction | 8 |
| Inactivate | 10 |
| Inactivates | 11 |
| Inactive | 8 |
| Inactive gas | 12 |
| Inactive mil. status | 20 |
| Inactive period | 15 |
| Inactive period in a factory | 28 |
| Inactive state | 14 |
| Inactive Tool song? | 19 |
| Inactive transporter, briefly | 29 |
| Inactive volcano, Mauna ___ | 27 |
| Inactive, as a volcano | 22 |
| Inactive, in a way: Abbr. | 25 |
| Inactive: Abbr. | 15 |
| Inactively | 10 |
| Inactiveness | 12 |
| Inactivity | 10 |
| Inadequate | 10 |
| Inadequate in Soho | 19 |
| Inadequate (whose initials spell "testicles") | 55 |
| Inadequate action | 17 |
| Inadequate specimen | 19 |
| Inadequate supply | 17 |
| Inadequate, as an excuse | 24 |
| Inadequate, in Soho | 19 |
| Inadequately | 12 |
| Inadmissible testimony of a sort | 32 |
| Inadvertence | 12 |
| Inadvertency | 12 |
| Inadvertent creator of phrases like "well-boiled icicle" | 66 |
| Inadvertent digital-image waves | 31 |
| Inadvertent mistakes | 20 |
| Inadvertent nocturnal activity | 30 |
| Inadvertent omission | 20 |
| Inadvertent remark | 18 |
| Inadvertent revelations | 23 |
| Inadvertently destructive sort, literally | 41 |
| Inadvertently reveal | 20 |
| Inadvertently revealing remark | 30 |