CSB
"csb" is a 3-letter English headword indexed on PlainSpell.
The verdict
“CSB” is uncommon English (frequency #62,811 among 43,570 “C” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #62,811
- frequency rank, English
- 43,570
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of Crime and Security Branch.
| Property | Value |
|---|---|
| Headword | CSB |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #62,811 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “CSB” sits in English frequency
Rare enough to double-check
CSB is uncommon English at frequency #62,811 among 43,570 “C” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 2 senses are on record.
The misspelling generator found no plausible variants for CSB, a straightforward case of a spelling with little room for common typos. No close-neighbour confusable shows up for this headword in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
No borrowing history is documented for this entry, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct English form is CSB, spelled C-S-B.
Definition
- 1Initialism of Crime and Security Branch.
- 2Initialism of Chemical Safety Board; short for U.S. Chemical Safety and Hazard Investigation Board.
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 “CSB”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-S-B - 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.