interdepartmental

adj

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

"interdepartmental" is a 17-letter English headword indexed on PlainSpell.

The verdict

“interdepartmental” is uncommon English (frequency #77,802 among 17,902 “I” headwords), classed as an adjective. The kind of spelling people second-guess.

#77,802
frequency rank, English
17,902
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Between departments; to do with the connection of departments.

Key facts for interdepartmental
PropertyValue
Headwordinterdepartmental
LanguageEnglish
Part of speechAdjective
Letters17
Frequency rank#77,802
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “interdepartmental” sits in English frequency

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

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

interdepartmental is uncommon English at frequency #77,802 among 17,902 “I” headwords, classed as anadjective. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for interdepartmental, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From inter- + department + -al. The correct English form is interdepartmental, spelled I-N-T-E-R-D-E-P-A-R-T-M-E-N-T-A-L.

Definition

  1. 1
    Between departments; to do with the connection of departments.
  2. 2
    Involving multiple departments; multidepartmental.

Etymology

From inter- + department + -al.

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 "interdepartmental"?
"interdepartmental" is spelled I-N-T-E-R-D-E-P-A-R-T-M-E-N-T-A-L.
What does "interdepartmental" mean?
As an adjective, "interdepartmental" means: Between departments; to do with the connection of departments.
What is the origin of the word "interdepartmental"?
From inter- + department + -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.

Using “interdepartmental”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is I-N-T-E-R-D-E-P-A-R-T-M-E-N-T-A-L - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list