IH

noun

By · According to Wiktionary data (CC BY-SA) ·

"ih" is a 2-letter English headword indexed on PlainSpell.

The verdict

“IH” sits in 20 confusable pairs (corpus #35,767) as a noun. The look-alike neighbours are the real trap.

#35,767
frequency rank, English
2,140
“I” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of industrial hygiene.

Corpus desk

Index EN-ih · IH · English

IH · rank #35,767 · 0 variants · 20 confusables

  • FREQ-MID #35,767
  • LEN-SHORT 2 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH idealist

Nearest frequency peer: idealist (-2 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Frequency neighbours of confusable “IH”

Peers at similar corpus weight, separate from look-alike pairs below

corpus weight

What this shows Bars place “IH” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

IH vs in
0% similar
IH vs is
0% similar
IH vs it
0% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for IH
PropertyValue
HeadwordIH
LanguageEnglish
Part of speechNoun
Letters2
Frequency rank#35,767
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus rank beside confusables of “IH”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).IHlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “idealist” (#35,765), “ibis” (#35,763), “indecisive” (#35,771). Among 2,140 “I” headwords, “IH” is #35,767. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for IH is neighbouring look-alikes ("in", "is", …), not just typos; it is anoun. Frequency #35,767 among 2,140 “I” headwords. 5 recorded senses keep meaning in play.

No generated misspelling entries exist for IH in our index, suggesting the orthography follows predictable English patterns. It also participates in 20 confusable-pair relationships, "in", "is", "it", and more, where similar look or sound leads writers to substitute one word for another in context.

This entry carries no recorded etymology, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is IH, spelled I-H.

Definition

  1. 1
    Initialism of industrial hygiene.
  2. 2
    Initialism of idiopathic hypersomnia.
  3. 3
    Initialism of induction hypothesis or inductive hypothesis.
  4. 4
    Initialism of interstate highway.
  5. 5
    International Harvester Company, a former machinery-building company and the tractor brand named for it.

Recorded use

Wiktionary example

These source excerpts show how IH appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Near-synonyms: OSH, OHS

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "IH"?
"IH" is spelled I-H.
What does "IH" mean?
As a noun, "IH" means: Initialism of industrial hygiene.
What words are commonly confused with "IH"?
"IH" is commonly confused with "in", "is", "it". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "IH" come from?
"IH" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list