isthmian
"isthmian" is a 8-letter English headword indexed on PlainSpell.
The verdict
“isthmian” is uncommon English (frequency #82,417 among 17,902 “I” headwords), classed as an adjective. The kind of spelling people second-guess.
- #82,417
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece.
| Property | Value |
|---|---|
| Headword | isthmian |
| Language | English |
| Part of speech | Adjective |
| Letters | 8 |
| Frequency rank | #82,417 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “isthmian” sits in English frequency
Rare enough to double-check
isthmian is uncommon English at frequency #82,417 among 17,902 “I” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece.".
Zero misspellings are on record for isthmian in our index, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From isthmus + -ian. The correct English form is isthmian, spelled I-S-T-H-M-I-A-N.
Definition
- 1Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece.
Etymology
From isthmus + -ian.
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 “isthmian”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-S-T-H-M-I-A-N - 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.