| Icelet | n | Icicle |
| Ice-Bone | n | H-bone |
| Ichet | n | Itch |
| Ichila-Pea | n | Mistle thrush |
| Ickitty-Pickitty | adv | Jerkily |
| Icybell | n | Icicle |
| Iddy-Iddy-All | n | Ball game, children's |
| Idjit | n | Type of agricultural implement |
| Idleton | n | Slacker |
| If zo be as | conj | If (intensive of) |
| Ignorant | adj | Ill-mannered |
| Igsy-Pigsy | adj | Higgledy-piggledy |
| Ilt | n | Piglet |
| Image | n | Plaster figure |
| Ime | n | Nose, tip of |
| Imitate | v | Resemble |
| Immedient | adj | Immediate |
| Imp | n | Shoot (of plant) |
| Imperence | n | Impudence |
| Imperent | adj | Impudent |
| Impingall | n | Ulcer |
| Improve | v | Learn one's trade |
| Impse | n | Image |
| Inbred | adj | Native |
| Inch | n | Encroach |
| Inchor | n | Shoot (of tree) |
| Inclinable | adj | Inclined to |
| Indel | adv | Indoors |
| Indetriment | n | Detriment |
| India | n | India-rubber |
| Indian-pink | adj | Ragged robin |
| Indoor servant | n | Live-in servant |
| Indoors | adj | Live-in (of servant) |
| Infaring | adv | Within |
| Infirm | adj | Foolish |
| Information | n | Inflammation |
| Ingle-Dog | n | Earthworm |
| Inground | n | Enclosed land |
| Injist | adv | Almost |
| Injury to, do an | v | Bewitch |
| Inkle | v | Conceive (idea or project) |
| Inless | conj | Unless |
| Inly | adv | Internally |
| Inobedient | adj | Disobdient |
| Intellects | n | Wits |
| Interlean | adj | Streaky (of bacon) |
| Intimated | adj | Intimate |
| Intress | n | Interest (financial) |
| Inwardly | adv | Sotto voce |
| In-Tye | phr | Not I |
| Ire (1) | n | Iron |
| Ire (2) | n | Onion |
| Irenese | n | Rennet |
| Iron-back | n | Iron plate at back of chimney |
| Ironen | adj | Iron, made of |
| Isabella | n | Game played by young people |
| Isle-Of-Wight dog | n | Laziness |
| Isle-Of-Wight parson | n | Cormorant |
| Isle-Of-Wight rock | n | Cheese, variety of |
| Isle-Of-Wight vine | n | Bryony |
| Isnet | n | Small bugloss |
| Iss | adv | Yes |
| Itching-berries | n | Dog rose hips |
| Item | n | Idea |
| Ivers, my | int | Eyes, my! |
| Ivy-drum | n | Ivy, climbing |
| Ivy-flower | n | Common hepatica |
| Izey-Tizey | adj | Uncertain |
| Izzard | n | Z (letter) |