orf

/ɔːf/

//ɔːf// noun

By · According to Wiktionary data (CC BY-SA) ·

"orf" is a 3-letter English headword indexed on PlainSpell.

The verdict

“orf” is uncommon English (frequency #70,136 among 1,431 “O” headwords), classed as a noun. The kind of spelling people second-guess.

#70,136
frequency rank, English
1,431
“O” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans.

Corpus desk

Index EN-orf · orf · English

orf · rank #70,136 · 0 variants · 0 confusables

  • FREQ-RARE #70,136
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,431
  • PHOTO-FINISH Oort

Nearest frequency peer: Oort (-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.

Long-tail ranks near “orf”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “orf” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for orf
PropertyValue
Headwordorf
LanguageEnglish
Part of speechNoun
IPA/ɔːf/
Letters3
Frequency rank#70,136
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “orf” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).orffalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “Oort” (#70,135), “ornithologist” (#70,137), “overburden” (#70,139). Among 1,431 “O” headwords, “orf” is #70,136. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

orf is uncommon English at frequency #70,136 among 1,431 “O” headwords, classed as anoun, transcribed /ɔːf/. Rarity is why readers land here mid-draft. Gloss: "An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans.".

orf doesn't appear in our generated misspelling index, a sign its spelling follows regular English conventions. This headword has no recorded confusable partner, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From Old Norse hrufa (“scab”), from Proto-Germanic *hreubaz (whence also dandruff). The correct English form is orf, spelled O-R-F.

Definition

  1. 1
    An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans.

Etymology

From Old Norse hrufa (“scab”), from Proto-Germanic *hreubaz (whence also dandruff).

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

How do you spell "orf"?
"orf" is spelled O-R-F. The IPA pronunciation is /ɔːf/.
What does "orf" mean?
As a noun, "orf" means: An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans.
How do you pronounce "orf"?
The IPA (International Phonetic Alphabet) transcription for "orf" is /ɔːf/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "orf"?
From Old Norse hrufa (“scab”), from Proto-Germanic *hreubaz (whence also dandruff). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "orf", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

RDC#70,194lez#70,035IOU#69,965HMC#69,929

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list