RF
"rf" is a 2-letter English headword indexed on PlainSpell.
The verdict
“RF” sits in 20 confusable pairs (corpus #14,007) as a noun. The look-alike neighbours are the real trap.
- #14,007
- frequency rank, English
- 3,094
- “R” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of right foot.
Corpus desk
Index EN-rf · RF · English
RF · rank #14,007 · 0 variants · 20 confusables
- FREQ-MID #14,007
- LEN-SHORT 2 letters
- VOW-0 0 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 3,094
- PHOTO-FINISH retaliation
Nearest frequency peer: retaliation (-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 neighbours of confusable “RF”
Peers at similar corpus weight, separate from look-alike pairs below
- replicate
replicate
85,997 corpus weight
- retaliation
retaliation
85,995 corpus weight
- RF
RF
85,994 corpus weight
- risking
risking
85,993 corpus weight
- rooftop
rooftop
85,992 corpus weight
- rooting
rooting
85,991 corpus weight
What this shows Bars place “RF” against nearest ranked English headwords, not a reprint of the confusable-pair desk.
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 | RF |
| Language | English |
| Part of speech | Noun |
| Letters | 2 |
| Frequency rank | #14,007 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “RF”
Easy to mix with look-alikes
The spelling risk for RF is neighbouring look-alikes ("RS", "RT", …), not just typos; it is anoun. Frequency #14,007 among 3,094 “R” headwords. 7 recorded senses keep meaning in play.
RF doesn't appear in our generated misspelling index, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "RS", "RT", "RM", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: Various etymologies. The correct English form is RF, spelled R-F.
Definition
- 1Initialism of right foot.
- 2Initialism of rangefinder.
- 3Initialism of radio frequency.
- 4Initialism of rheumatoid factor.
- 5Initialism of ratfuck (“dirty rick or act of sabotage or interference”).
- 6Initialism of right field or right fielder.
- 7Abbreviation of radiance field.
Recorded use
Wiktionary examplesThese source excerpts show how RF appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
If battalion staff were involved, we generally called the insertion an RF, Romeo Foxtrot, or Rat Fuck.
Thinking they actually were supporting the demonstrators, I went up to them and asked why. “No, we're not supporting them. This is just an RF (short for “Rat Fuck”). We're keeping the money," they told me, laughing.
Etymology
Various etymologies.
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.