TSA

name

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

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

The verdict

“TSA” is a moderately-common English word, ranked #18,720 in English word frequency and used as a proper noun.

#18,720
frequency rank, English
3
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of Transportation Security Administration.

Visual similarity to commonly confused words

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

TSA vs TV
33% similar
TSA vs TX
33% similar
TSA vs Tu
33% similar

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

Key facts for TSA
PropertyValue
HeadwordTSA
LanguageEnglish
Part of speechProper noun
Letters3
Frequency rank#18,720
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “TSA” sits in English frequency

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

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for TSA is 3 letters long, classified as a proper noun. Corpus data places it at rank #18,720 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.

Our edit-distance generator produced no likely misspellings for TSA, suggesting the orthography follows predictable English patterns. It also participates in 20 confusable-pair relationships, "TV", "TX", "Tu", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Wiktionary doesn't record an etymology for this headword, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is TSA, spelled T-S-A.

Definition

  1. 1
    Initialism of Transportation Security Administration.
  2. 2
    Initialism of Territory-wide System Assessment.

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 "TSA"?
"TSA" is spelled T-S-A.
What does "TSA" mean?
As a proper noun, "TSA" means: Initialism of Transportation Security Administration.
What words are commonly confused with "TSA"?
"TSA" is commonly confused with "TV", "TX", "Tu". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "TSA" come from?
"TSA" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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.

Using “TSA”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is T-S-A - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “TV” - see the side-by-side comparison. TSA vs TV
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list