CSX
/ˈsi.ɛsˌɛks/
"csx" is a 3-letter English headword indexed on PlainSpell.
The verdict
“CSX” sits in 20 confusable pairs (corpus #48,688) as a proper noun. The look-alike neighbours are the real trap.
- #48,688
- frequency rank, English
- 43,570
- “C” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - CSX Transportation, an American Class I freight railroad that operates in the eastern United States and in the southern parts of Ontario and Québec. Its chief competitor is the Norfolk Southern Rai...
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | CSX |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈsi.ɛsˌɛks/ |
| Letters | 3 |
| Frequency rank | #48,688 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “CSX” sits in English frequency
Easy to mix with look-alikes
The spelling risk for CSX is neighbouring look-alikes ("CT", "CV", …), not just typos; it is aproper noun pronounced /ˈsi.ɛsˌɛks/. Frequency #48,688 among 43,570 “C” headwords. 4 recorded senses keep meaning in play.
Our edit-distance generator produced no likely misspellings for CSX, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "CT", "CV", "CU", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
No borrowing history is documented for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is CSX, spelled C-S-X.
Definition
- 1CSX Transportation, an American Class I freight railroad that operates in the eastern United States and in the southern parts of Ontario and Québec. Its chief competitor is the Norfolk Southern Railway. This railroad formed from a merger with the Chessie System and Seaboard System railroads in the nineteen eighties.
- 2An abbreviation for a stock exchange in Cambodia. It stands for the Cambodia Securities Exchange.
- 3A Chrysler and Carroll Shelby car that was manufactured from 1987 to 1989
- 4An Acura car that was produced from late 2005 to late 2011. It was replaced by the Acura ILX.
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 “CSX”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-S-X - every other letter order is a misspelling in standard orthography.
- Say it as /ˈsi.ɛsˌɛks/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “CT” - see the side-by-side comparison. CSX vs CT
- Browse more English words and confusable pairs in the same reference. English words
Words at a similar English frequency
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.