fo
"fo" is a 2-letter English headword indexed on PlainSpell.
The verdict
“fo” sits in 20 confusable pairs (corpus #12,049) as a noun. The look-alike neighbours are the real trap.
- #12,049
- frequency rank, English
- 2,507
- “F” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of folio, page and book size (10"-12.5" x 15"-20").
Corpus desk
Index EN-fo · fo · English
fo · rank #12,049 · 0 variants · 20 confusables
- FREQ-MID #12,049
- LEN-SHORT 2 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH flipped
Nearest frequency peer: flipped (-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 “fo”
Peers at similar corpus weight, separate from look-alike pairs below
- fetch
fetch
87,955 corpus weight
- fishermen
fishermen
87,954 corpus weight
- flipped
flipped
87,953 corpus weight
- fo
fo
87,952 corpus weight
- formidable
formidable
87,951 corpus weight
- Frankie
Frankie
87,950 corpus weight
What this shows Bars place “fo” 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 | fo |
| Language | English |
| Part of speech | Noun |
| Letters | 2 |
| Frequency rank | #12,049 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “fo”
Easy to mix with look-alikes
The spelling risk for fo is neighbouring look-alikes ("fu", "FS", …), not just typos; it is anoun. Frequency #12,049 among 2,507 “F” headwords. Gloss: "Abbreviation of folio, page and book size (10"-12.5" x 15"-20").".
Zero misspellings are on record for fo in our index, a sign its spelling follows regular English conventions. It also participates in 20 confusable-pair relationships, "fu", "FS", "FP", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Clipping of folio. The correct English form is fo, spelled F-O.
Definition
- 1Abbreviation of folio, page and book size (10"-12.5" x 15"-20").
Etymology
Clipping of folio.
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.