fin

/fɪn/

//fɪn// noun

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

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

The verdict

“fin” sits in 20 confusable pairs (corpus #11,210) as a noun. The look-alike neighbours are the real trap.

#11,210
frequency rank, English
2,507
“F” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.

Corpus desk

Index EN-fin · fin · English

fin · rank #11,210 · 0 variants · 20 confusables

  • FREQ-MID #11,210
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH fined

Nearest frequency peer: fined (+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 “fin”

Peers at similar corpus weight, separate from look-alike pairs below

corpus weight

What this shows Bars place “fin” against nearest ranked English headwords, not a reprint of the confusable-pair desk.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

fin vs FL
0% similar
fin vs FM
0% similar
fin vs fu
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for fin
PropertyValue
Headwordfin
LanguageEnglish
Part of speechNoun
IPA/fɪn/
Letters3
Frequency rank#11,210
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus rank beside confusables of “fin”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).finlands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “fined” (#11,211), “Everton” (#11,208), “flora” (#11,212). Among 2,507 “F” headwords, “fin” is #11,210. Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for fin is neighbouring look-alikes ("FL", "FM", …), not just typos; it is anoun pronounced /fɪn/. Frequency #11,210 among 2,507 “F” headwords. 11 recorded senses keep meaning in play.

fin doesn't appear in our generated misspelling index, which points to an orthography that plays by predictable English rules. It also participates in 20 confusable-pair relationships, "FL", "FM", "fu", 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 fin, from Old English finn, from Proto-Germanic *finnō, *finǭ (“dorsal fin”) (compare Dutch vin, German Finne, Swedish finne, fena), from Proto-Indo-European *(s)pīn- (“backbone, dorsal fin”) (compare Old Irish ind (“end, point”), Latin … The correct English form is fin, spelled F-I-N.

Definition

  1. 1
    One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.
  2. 2
    A similar appendage of a cetacean or other marine animal.
  3. 3
    A thin, rigid component of an aircraft, extending from the fuselage and used to stabilise and steer the aircraft.
  4. 4
    A similar structure protruding from a projectile, used to help keep it on course.
  5. 5
    A similar structure on the bottom of a surfboard, used to help steer it.
  6. 6
    A hairstyle, resembling the fin of a fish, in which the hair is combed and set into a vertical ridge along the top of the head from about the crown to the forehead.
  7. 7
    A device worn by divers and swimmers on their feet.
  8. 8
    An extending part on a surface of a radiator, engine, heatsink, etc., used to facilitate cooling.
  9. 9
    A sharp raised edge (generally in concrete) capable of damaging a roof membrane or vapor retarder.
  10. 10
    The conning tower of a submarine.
  11. 11
    A person's hand.

Recorded use

Wiktionary examples

These source excerpts show how fin appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. The fish's fins minimize water flow.
  2. Then he commenced to talk, really talk. and inside of two flaps of a herring's fin he had me mesmerized, like Eben Holt's boy at the town hall show. He talked about the ills of humanity, and the glories of health and Nature and service and land knows what all.

Etymology

From Middle English fin, from Old English finn, from Proto-Germanic *finnō, *finǭ (“dorsal fin”) (compare Dutch vin, German Finne, Swedish finne, fena), from Proto-Indo-European *(s)pīn- (“backbone, dorsal fin”) (compare Old Irish ind (“end, point”), Latin pinna (“feather, wing, fin”), Tocharian A spin (“hook”).

Synonyms

flippervaneMohicanflipper

This word in other languages

aleta(Español)nageoire(Français)Flosse(Deutsch)barbatana(Português)

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 "fin"?
"fin" is spelled F-I-N. The IPA pronunciation is /fɪn/.
What does "fin" mean?
As a noun, "fin" means: One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.
What words are commonly confused with "fin"?
"fin" is commonly confused with "FL", "FM", "fu". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "fin"?
The IPA (International Phonetic Alphabet) transcription for "fin" is /fɪn/. 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 "fin"?
From Middle English fin, from Old English finn, from Proto-Germanic *finnō, *finǭ (“dorsal fin”) (compare Dutch vin, German Finne, Swedish finne, fena), from Proto-Indo-European *(s)pīn- (“backbone, dorsal fin”) (compare Old Irish ind (“end, point... 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 "fin", not the corpus desk frequency band.

Same letter count

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

cha#11,179AFC#11,159pos#11,268val#11,148

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

Source: FrequencyWords open word-frequency list