FISA

name

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

"fisa" is a 4-letter English headword indexed on PlainSpell.

The verdict

“FISA” has 5 generated spelling variants in the English index at frequency #32,399. The variants make it a useful spelling check.

#32,399
frequency rank, English
2,507
“F” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Acronym of Foreign Intelligence Surveillance Act.

Corpus desk

Index EN-fisa · FISA · English

FISA · rank #32,399 · 5 variants · 20 confusables

  • FREQ-MID #32,399
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 2,507
  • PHOTO-FINISH Finney

Nearest frequency peer: Finney (-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.

Rank peers near misspelling magnet “FISA”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “FISA” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

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).

FISA vs FS
50% similar
FISA vs fit
0% similar
FISA vs fix
0% similar

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

Key facts for FISA
PropertyValue
HeadwordFISA
LanguageEnglish
Part of speechProper noun
Letters4
Frequency rank#32,399
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “FISA”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).FISAlands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “Finney” (#32,398), “flatly” (#32,400), “Figaro” (#32,397). Among 2,507 “F” headwords, “FISA” is #32,399. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around FISA, aproper noun. Corpus frequency is #32,399 among 2,507 “F” headwords. Dominant gloss: "Acronym of Foreign Intelligence Surveillance Act.".

Our generated misspelling index lists 5 likely wrong-spelling variants for FISA, with forms such as "ffisa", "fias", and "fissa". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 20 confusable-pair relationships, "FS", "fit", "fix", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

This headword's origin isn't recorded in our source data, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is FISA, spelled F-I-S-A.

Definition

  1. 1
    Acronym of Foreign Intelligence Surveillance Act.

Recorded use

Wiktionary example

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

  1. Notably, however, the FISA wiretapping of Mr. Page that Trump allies are upset about was the 1978 kind that involves warrants, the authority for which is not expiring.

Common misspellings

Also misspelled as:

  • ffisa
  • fias
  • fissa
  • fsia
  • ifsa

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of FISA - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

ffisa1fias2fissa1fsia2ifsa2
Edit distance from "FISA"

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 "FISA"?
"FISA" is spelled F-I-S-A.
What does "FISA" mean?
As a proper noun, "FISA" means: Acronym of Foreign Intelligence Surveillance Act.
What words are commonly confused with "FISA"?
"FISA" is commonly confused with "FS", "fit", "fix". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "FISA" come from?
"FISA" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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 "FISA", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

faze#32,393Evie#32,387gila#32,414DotA#32,362

Similar misspelling depth

Headwords with a similar count of attested misspellings (5 here; floor ≥5).

Leela5 variantsChiu5 variantsmagi5 variantsBabel5 variants

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

Source: FrequencyWords open word-frequency list