O'Fallon
"o-fallon" is a 7-letter English headword indexed on PlainSpell.
The verdict
“O'Fallon” is uncommon English (frequency #87,625 among 15,494 “O” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #87,625
- frequency rank, English
- 15,494
- “O” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A surname from Irish.
Corpus desk
Index EN-o-fallon · O'Fallon · English
O'Fallon · rank #87,625 · 0 variants · 0 confusables
- FREQ-RARE #87,625
- LEN-LONG 8 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 15,494
- PHOTO-FINISH nystagmus
Nearest frequency peer: nystagmus (-2 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.
Frequency neighbourhood for “O'Fallon”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- Nuala
Nuala
12,383 corpus weight
- NVDA
NVDA
12,381 corpus weight
- Nyborg
Nyborg
12,379 corpus weight
- nystagmus
nystagmus
12,378 corpus weight
- O'Fallon
O'Fallon
12,376 corpus weight
- obstetrical
obstetrical
12,373 corpus weight
What this shows Bars show where “O'Fallon” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | O'Fallon |
| Language | English |
| Part of speech | Proper noun |
| Letters | 8 |
| Frequency rank | #87,625 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “O'Fallon” sits in English frequency
Rare enough to double-check
O'Fallon is uncommon English at frequency #87,625 among 15,494 “O” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 3 senses are on record.
No misspelling variants are generated for O'Fallon in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: See Fallon. The correct English form is O'Fallon, spelled O-'-F-A-L-L-O-N.
Definition
- 1A surname from Irish.
- 2A city in St. Clair County, Illinois, United States.
- 3A city in St. Charles County, Missouri, United States.
Etymology
See Fallon.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
How do you spell "O'Fallon"?
What does "O'Fallon" mean?
What is the origin of the word "O'Fallon"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "O'Fallon", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 8 letters (nearest by frequency 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.