interregional

adj

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

"interregional" is a 13-letter English headword indexed on PlainSpell.

The verdict

“interregional” is uncommon English (frequency #89,488 among 2,140 “I” headwords), classed as an adjective. The kind of spelling people second-guess.

#89,488
frequency rank, English
2,140
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Of, pertaining to, or connecting two or more regions.

Corpus desk

Index EN-interregional · interregional · English

interregional · rank #89,488 · 0 variants · 0 confusables

  • FREQ-RARE #89,488
  • LEN-MEGA 13 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH interdenomina…

Nearest frequency peer: interdenominational (-1 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.

Long-tail ranks near “interregional”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “interregional” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for interregional
PropertyValue
Headwordinterregional
LanguageEnglish
Part of speechAdjective
Letters13
Frequency rank#89,488
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “interregional” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).interregionalfalls in this rarity band:

#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. Rare peers in the same band: “interdenominational” (#89,487), “Irak” (#89,489), “irregardless” (#89,490). Among 2,140 “I” headwords, “interregional” is #89,488. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

interregional is uncommon English at frequency #89,488 among 2,140 “I” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Of, pertaining to, or connecting two or more regions.".

interregional has no tracked misspelling variants, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From inter- + region + -al. The correct English form is interregional, spelled I-N-T-E-R-R-E-G-I-O-N-A-L.

Definition

  1. 1
    Of, pertaining to, or connecting two or more regions.

Recorded use

Wiktionary example

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

  1. Near-synonym: transregional

Etymology

From inter- + region + -al.

This word in other languages

interrégional(Français)

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 "interregional"?
"interregional" is spelled I-N-T-E-R-R-E-G-I-O-N-A-L.
What does "interregional" mean?
As an adjective, "interregional" means: Of, pertaining to, or connecting two or more regions.
What is the origin of the word "interregional"?
From inter- + region + -al. See the full etymology section above for more details.
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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "interregional", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 13 letters (nearest by frequency rank).

oropharyngeal#89,712preprocessing#89,791brachytherapy#89,180southwestward#89,928

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

Source: FrequencyWords open word-frequency list