FII
"fii" is a 3-letter English headword indexed on PlainSpell.
The verdict
“FII” is uncommon English (frequency #87,285 among 2,507 “F” headwords), classed as a noun. The kind of spelling people second-guess.
- #87,285
- frequency rank, English
- 2,507
- “F” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of factor II (“= clotting factor II = prothrombin”).
Corpus desk
Index EN-fii · FII · English
FII · rank #87,285 · 0 variants · 0 confusables
- FREQ-RARE #87,285
- LEN-MID 3 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH filmer
Nearest frequency peer: filmer (+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 “FII”
Sparse band: bars invert rank so rarer forms read shorter
- ferritin
ferritin
12,721 corpus weight
- fibroid
fibroid
12,720 corpus weight
- FII
FII
12,716 corpus weight
- filmer
filmer
12,715 corpus weight
- fitment
fitment
12,712 corpus weight
- fluffing
fluffing
12,709 corpus weight
What this shows Long-tail view: where “FII” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | FII |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #87,285 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “FII” in English
Rare enough to double-check
FII is uncommon English at frequency #87,285 among 2,507 “F” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
Zero misspellings are on record for FII in our index, a sign its spelling follows regular English conventions. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
No explicit etymology string is stored 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 FII, spelled F-I-I.
Definition
- 1Abbreviation of factor II (“= clotting factor II = prothrombin”).
- 2Initialism of foreign indirect investment, broadly synonymous with foreign portfolio investment.
Recorded use
Wiktionary exampleThese source excerpts show how FII appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Near-synonym: FPI
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "FII", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).