fen
/fɛn/
"fen" is a 3-letter English headword indexed on PlainSpell.
The verdict
“fen” sits in 20 confusable pairs (corpus #35,717) as a noun. The look-alike neighbours are the real trap.
- #35,717
- frequency rank, English
- 2,507
- “F” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A type of wetland fed by ground water and runoff, containing peat below the waterline, characteristically alkaline.
Corpus desk
Index EN-fen · fen · English
fen · rank #35,717 · 0 variants · 20 confusables
- FREQ-MID #35,717
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 2,507
- PHOTO-FINISH fanart
Nearest frequency peer: fanart (-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 “fen”
Peers at similar corpus weight, separate from look-alike pairs below
- fac
fac
64,287 corpus weight
- fallow
fallow
64,286 corpus weight
- fanart
fanart
64,285 corpus weight
- fen
fen
64,284 corpus weight
- fermi
fermi
64,283 corpus weight
- fiddler
fiddler
64,282 corpus weight
What this shows Bars place “fen” 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 | fen |
| Language | English |
| Part of speech | Noun |
| IPA | /fɛn/ |
| Letters | 3 |
| Frequency rank | #35,717 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Corpus rank beside confusables of “fen”
Easy to mix with look-alikes
The spelling risk for fen is neighbouring look-alikes ("fi", "FL", …), not just typos; it is anoun pronounced /fɛn/. Frequency #35,717 among 2,507 “F” headwords. 2 recorded senses keep meaning in play.
The misspelling generator found no plausible variants for fen, which points to an orthography that plays by predictable English rules. It also participates in 20 confusable-pair relationships, "fi", "FL", "FM", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Middle English fen, fenne, from Old English fenn (“fen; marsh; mud; dirt”), Proto-West Germanic *fani, from Proto-Germanic *fanją, from Proto-Indo-European *pen- (“bog, mire”). See also West Frisian fean, Dutch veen, German Fenn, Norwegian fen; also Mi… The correct English form is fen, spelled F-E-N.
Definition
- 1A type of wetland fed by ground water and runoff, containing peat below the waterline, characteristically alkaline.
- 2Any swamp or mire (especially with negative connotations).
Recorded use
Wiktionary examplesThese source excerpts show how fen appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Near-synonyms: marsh, swamp, bog, mire
Bogs are acidic, nutrient poor, and have a low species diversity, whereas fens are less acidic and have higher nutrient levels and species diversity.
Etymology
From Middle English fen, fenne, from Old English fenn (“fen; marsh; mud; dirt”), Proto-West Germanic *fani, from Proto-Germanic *fanją, from Proto-Indo-European *pen- (“bog, mire”). See also West Frisian fean, Dutch veen, German Fenn, Norwegian fen; also Middle Irish en (“water”), enach (“swamp”), Old Prussian pannean (“peat-bog”), Sanskrit पङ्क (paṅka, “marsh, mud, mire, slough”).
This word in other languages
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 "fen", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).