CRF
"crf" is a 3-letter English headword indexed on PlainSpell.
The verdict
“CRF” is uncommon English (frequency #65,802 among 43,570 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #65,802
- frequency rank, English
- 43,570
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of conditional random field.
Corpus desk
Index EN-crf · CRF · English
CRF · rank #65,802 · 0 variants · 0 confusables
- FREQ-RARE #65,802
- LEN-MID 3 letters
- VOW-0 0 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 43,570
- PHOTO-FINISH creditworthin…
Nearest frequency peer: creditworthiness (-1 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 “CRF”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- cowling
cowling
34,204 corpus weight
- cravat
cravat
34,201 corpus weight
- creditworth…
creditworthiness
34,200 corpus weight
- CRF
CRF
34,199 corpus weight
- cringy
cringy
34,198 corpus weight
- crossbones
crossbones
34,197 corpus weight
What this shows Bars show where “CRF” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | CRF |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #65,802 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “CRF” sits in English frequency
Rare enough to double-check
CRF is uncommon English at frequency #65,802 among 43,570 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. 4 senses are on record.
We couldn't generate a plausible misspelling set for CRF, suggesting the orthography follows predictable English patterns. Our confusable-pair dataset has no match for it, which typically means the spelling is too distinctive to be mistaken for another word.
No explicit etymology string is stored for this entry, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is CRF, spelled C-R-F.
Definition
- 1Initialism of conditional random field.
- 2Initialism of case report form.
- 3Initialism of comment resolution form or comment response form.
- 4Initialism of cardiorespiratory fitness
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "CRF", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 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.