Isan
"isan" is a 4-letter English headword indexed on PlainSpell.
The verdict
“Isan” is uncommon English (frequency #90,590 among 2,140 “I” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #90,590
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A large region in northeastern Thailand, on the Khorat Plateau.
Corpus desk
Index EN-isan · Isan · English
Isan · rank #90,590 · 0 variants · 0 confusables
- FREQ-RARE #90,590
- LEN-MID 4 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH Iqaluit
Nearest frequency peer: Iqaluit (-3 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 “Isan”
Sparse band: bars invert rank so rarer forms read shorter
- interrelati…
interrelationship
9,418 corpus weight
- invertible
invertible
9,417 corpus weight
- Iqaluit
Iqaluit
9,414 corpus weight
- Isan
Isan
9,411 corpus weight
- jeepney
jeepney
9,407 corpus weight
- jigging
jigging
9,405 corpus weight
What this shows Long-tail view: where “Isan” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | Isan |
| Language | English |
| Part of speech | Proper noun |
| Letters | 4 |
| Frequency rank | #90,590 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “Isan” in English
Rare enough to double-check
Isan is uncommon English at frequency #90,590 among 2,140 “I” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 2 senses are on record.
Isan doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. This headword has no recorded confusable partner, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From Thai อีสาน (ii-sǎan) (same in Isan), claimed to be from Sanskrit ईशान (īśāna, “Shiva of the northeast”). The correct English form is Isan, spelled I-S-A-N.
Definition
- 1A large region in northeastern Thailand, on the Khorat Plateau.
- 2The language of the Isan people (between Lao and Thai, and sometimes considered a dialect of Lao, although it is written in Thai script).
Etymology
From Thai อีสาน (ii-sǎan) (same in Isan), claimed to be from Sanskrit ईशान (īśāna, “Shiva of the northeast”).
Synonyms
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "Isan", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 letters (nearest by frequency rank).