| Incubation sites | 16 |
| Incubation station | 18 |
| Incubator | 9 |
| Incubator activity | 18 |
| Incubator babies | 16 |
| Incubator baby | 14 |
| Incubator baby, familiarly | 26 |
| Incubator din | 13 |
| Incubator dwellers | 18 |
| Incubator inhabitants | 21 |
| Incubator items | 15 |
| Incubator newcomers | 19 |
| Incubator noise | 15 |
| Incubator occupant | 18 |
| Incubator part | 14 |
| Incubator sound | 15 |
| Incubator sounds | 16 |
| Incubator spot: Abbr. | 21 |
| Incubators | 10 |
| Incubus | 7 |
| Incubus "Here In My ___" | 34 |
| Incubus "Make ___" | 28 |
| Incubus "Morning ___" | 31 |
| Incubus "___ and Water" | 33 |
| Incubus lead singer Brandon | 27 |
| Incubus singer Brandon | 22 |
| Incubus song about shoveling? | 29 |
| Incubus, e.g. | 13 |
| Incubus, for one | 16 |
| Incubuses | 9 |
| Inculcate | 9 |
| Inculcate, as suspicion | 23 |
| Inculpated | 10 |
| Inculpates | 10 |
| Incumbency | 10 |
| Incumbent | 9 |
| Incumbent on | 12 |
| Incumbent upon | 14 |
| Incumbents | 10 |
| Incumbents on their way out | 27 |
| Incumbents who are on their way out | 35 |
| Incumbrance | 11 |
| Incur | 5 |
| Incur additional cell phone charges, perhaps | 44 |
| Incur an additional charge for cellphone service | 48 |
| Incur cellphone charges, maybe | 30 |
| Incur coryza | 12 |
| Incur extra cell charges, perhaps | 33 |
| Incur the SEC's wrath | 25 |
| Incur, as a tab | 15 |
| Incur, as debts | 15 |
| Incurred | 8 |
| Incurred, as a bar bill | 23 |
| Incurred, as a bar tab | 22 |
| Incurred, as a debt | 19 |
| Incurred, as charges | 20 |
| Incurred, as debt | 17 |
| Incurred, as debts | 18 |
| Incurring a fine, maybe | 23 |
| Incurring a fine, perhaps | 25 |
| Incurring a late fee | 20 |
| Incurs lots of, as costs | 24 |
| Incursion | 9 |
| Incursion at a sorority | 23 |
| Incursion participant | 21 |
| Incursion upon a Muslim holy city | 33 |
| Incursions | 10 |
| Incurved chair support | 22 |
| Incus | 5 |
| Incus or malleus | 16 |
| Incus site | 10 |
| Incus, familiarly | 17 |
| Ind. cager | 10 |
| Ind. city | 9 |
| Ind. court team | 15 |
| Ind. five | 9 |
| Ind. government organization | 28 |
| Ind. governor | 13 |
| Ind. hemp: Var. | 15 |
| Ind. hoopsters | 14 |
| Ind. Indians | 12 |
| Ind. leader | 11 |
| Ind. nation since 1948 | 22 |
| Ind. neighbor | 13 |
| Ind. shoes | 10 |
| Ind. state flower | 17 |
| Ind. town | 9 |
| Indebted | 8 |
| Indebted "Citizen Kane" actor | 39 |
| Indebted (to) | 13 |
| Indebted basketball star | 24 |
| Indebted cartoon duo | 20 |
| Indebted laborer | 16 |
| Indebted Oscar-winning foreign director | 39 |
| Indebted speed skater | 21 |
| Indebted to | 11 |
| Indebted to the pot, in poker lingo | 35 |
| Indebtedness | 12 |
| Indebtedness initials | 21 |
| Indecent | 8 |