transboundary
"transboundary" is a 13-letter English headword indexed on PlainSpell.
The verdict
“transboundary” is uncommon English (frequency #75,502 among 27,828 “T” headwords), classed as an adjective. The kind of spelling people second-guess.
- #75,502
- frequency rank, English
- 27,828
- “T” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Across a boundary.
| Property | Value |
|---|---|
| Headword | transboundary |
| Language | English |
| Part of speech | Adjective |
| Letters | 13 |
| Frequency rank | #75,502 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “transboundary” sits in English frequency
Rare enough to double-check
transboundary is uncommon English at frequency #75,502 among 27,828 “T” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Across a boundary.".
transboundary doesn't appear in our generated misspelling index, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: From trans- + boundary. The correct English form is transboundary, spelled T-R-A-N-S-B-O-U-N-D-A-R-Y.
Definition
- 1Across a boundary.
Etymology
From trans- + boundary.
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
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Using “transboundary”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is T-R-A-N-S-B-O-U-N-D-A-R-Y - 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.