interpenetration
"interpenetration" is a 16-letter English headword indexed on PlainSpell.
The verdict
“interpenetration” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 16
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The act of penetrating between or within other substances; mutual penetration.
| Property | Value |
|---|---|
| Headword | interpenetration |
| Language | English |
| Part of speech | Noun |
| Letters | 16 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “interpenetration” sits in English frequency
Rare enough to double-check
interpenetration is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
interpenetration doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From inter- + penetration. The correct English form is interpenetration, spelled I-N-T-E-R-P-E-N-E-T-R-A-T-I-O-N.
Definition
- 1The act of penetrating between or within other substances; mutual penetration.
- 2The situation of two or more bodies overlapping in three-dimensional space, with part of the bodies lying within each other.
Etymology
From inter- + penetration.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “interpenetration”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-T-E-R-P-E-N-E-T-R-A-T-I-O-N - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
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.