IHCnounInitialism of immunohistochemistry.
IHEnounInitialism of institution of higher education.
IHOPnameAcronym of International House of Pancakes, a US-based restaurant chain.
IHRnameAcronym of International Health Regulations.
ihtphraseInitialism of I had to.
IInounInitialism of illegal immigrant.
IIBnounInitialism of instance initialization block.
iidnounInitialism of independent investigations division
IidanameA surname from Japanese.
IIHFnameInitialism of International Ice Hockey Federation.
IIRnounInitialism of infinite impulse response.
IITnameInitialism of Indian Institutes of Technology.
IJnameA lake (formerly a bay) adjoining the city of Amsterdam, Netherlands.
IKphraseInitialism of I know.
IkenameA diminutive of the male given name Isaac.
IKEAnameAn international, originally Swedish home products retailer that sells modern, utilitarian design furniture, much of which is assembled by the consumer.
IkedanameA surname from Japanese.
ikonnounAlternative form of icon (religious image).
IlannameA male given name from Hebrew.
ILDnounInitialism of interstitial lung disease.
ilenounAlternative form of ail (“awn”).
IleananameA commune of Călărași County, Romania.
ileumnounThe last, and usually the longest, division of the small intestine; the part between the jejunum and large intestine.
ilexnounHolm oak (Quercus ilex).
IlfordnameA locality in the Mid-Western council area, eastern New South Wales, Australia.
IlfracombenameA seaside town and civil parish with a town council in North Devon district, Devon, England (OS grid ref SS5147).
IlhamnameA male given name.
IlinameAn automonous prefecture in Northern Xinjiang autonomous region, China.
iliacadjRelating to the ilium.
IliadnameA famous ancient Greek epic poem about the Trojan War, attributed to Homer.
iliumnounThe upper and widest of the three bones that make up each side of the hipbone.
illadjEvil; wicked (of people).
illegaladjContrary to, forbidden, or not authorized by law, especially criminal law.
illegibleadjNot clear enough to be read; unreadable; not legible or decipherable.
illegitimateadjNot conforming to known principles, or established or accepted rules or standards.
illiberaladjRestricting or failing to sufficiently promote individual choice and freedom.
illicitadjNot approved by law, but not invalid.
illicitlyadvIn an illicit manner; illegally, immorally, or inappropriately.
IllinoisnameA state of the United States, named for the people.
illnessnounAn instance of a disease or poor health.
illogicaladjContrary to logic; lacking sense or sound reasoning.
Spelling & Dictionary Insight
The English alphabetical index for the letter I contains 17,902 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 359 pages, and you are currently viewing page 5. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "I" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.