tertiary

/ˈtɜː.ʃi.ə.ɹiː/

//ˈtɜː.ʃi.ə.ɹiː// adj

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

"tertiary" is a 8-letter English headword indexed on PlainSpell.

The verdict

“tertiary” has 12 generated spelling variants in the English index at frequency #14,439. The variants make it a useful spelling check.

#14,439
frequency rank, English
3,151
“T” headwords
12
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Of third rank or order; subsequent.

Corpus desk

Index EN-tertiary · tertiary · English

tertiary · rank #14,439 · 12 variants · 0 confusables

  • FREQ-MID #14,439
  • LEN-LONG 8 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-MID 12 variants
  • BOOK-MID 3,151
  • PHOTO-FINISH tempered

Nearest frequency peer: tempered (-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 “tertiary”

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

corpus weight

What this shows “tertiary” 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
Key facts for tertiary
PropertyValue
Headwordtertiary
LanguageEnglish
Part of speechAdjective
IPA/ˈtɜː.ʃi.ə.ɹiː/
Letters8
Frequency rank#14,439
Misspellings tracked12
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “tertiary”

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

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “tempered” (#14,438), “thyroid” (#14,440), “televised” (#14,437). Among 3,151 “T” headwords, “tertiary” is #14,439. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around tertiary (IPA /ˈtɜː.ʃi.ə.ɹiː/), anadjective. Corpus frequency is #14,439 among 3,151 “T” headwords. Wiktionary lists 3 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for tertiary, with forms such as "etrtiary", "teritary", and "terrtiary". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It is not paired with a close-neighbour confusable in our dataset, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: PIE word *tréyes Borrowed from the Latin tertiārius (“of the third part or rank”), from tertius (“third”) (from Proto-Indo-European *tr̥tyós, whence English third) + -ārius (whence the English suffix -ary); compare the French tertiaire. By surface analysis… The correct English form is tertiary, spelled T-E-R-T-I-A-R-Y.

Definition

  1. 1
    Of third rank or order; subsequent.
  2. 2
    Possessing some quality in the third degree; especially having been subjected to the substitution of three atoms or radicals.
  3. 3
    Of quills: growing on the innermost joint of a bird's wing; tertial.

Recorded use

Wiktionary examples

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

  1. Beſides theſe primordial mountains, M. [P[eter] S[imon]] Pallas maintains, that there are others of a more recent origin. These he calls ſecondary and tertiary: […] the latter ariſe from the wrecks and contents of the ſea, raiſed and tranſported by volcanic eruptions and conſequent inundations.
  2. An untaught peasant beheld the elements around him and was acquainted with their practical uses. The most learned philosopher knew little more. He had partially unveiled the face of Nature, but her immortal lineaments were still a wonder and a mystery. He might dissect, anatomize, and give names; but, not to speak of a final cause, causes in their seconda…

Etymology

PIE word *tréyes Borrowed from the Latin tertiārius (“of the third part or rank”), from tertius (“third”) (from Proto-Indo-European *tr̥tyós, whence English third) + -ārius (whence the English suffix -ary); compare the French tertiaire. By surface analysis, terti- + -ary.

Synonyms

ternarytertial

This word in other languages

terciario(Español)tertiaire(Français)tertiär(Deutsch)terciário(Português)

Common misspellings

Also misspelled as:

  • etrtiary
  • teritary
  • terrtiary
  • tertairy
  • tertiarry
  • tertiaryy
  • tertiayr
  • tertiray
  • terttiary
  • tetriary
  • tretiary
  • ttertiary

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of tertiary - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

etrtiary2teritary2terrtiary1tertairy2tertiarry1tertiaryy1tertiayr2tertiray2
Edit distance from "tertiary"

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 "tertiary"?
"tertiary" is spelled T-E-R-T-I-A-R-Y. The IPA pronunciation is /ˈtɜː.ʃi.ə.ɹiː/.
What does "tertiary" mean?
As an adjective, "tertiary" means: Of third rank or order; subsequent.
What are common misspellings of "tertiary"?
Common misspellings include "etrtiary", "teritary", "terrtiary", "tertairy", "tertiarry". The correct spelling is "tertiary".
How do you pronounce "tertiary"?
The IPA (International Phonetic Alphabet) transcription for "tertiary" is /ˈtɜː.ʃi.ə.ɹiː/. 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 "tertiary"?
PIE word *tréyes Borrowed from the Latin tertiārius (“of the third part or rank”), from tertius (“third”) (from Proto-Indo-European *tr̥tyós, whence English third) + -ārius (whence the English suffix -ary); compare the French tertiaire. By surfac... 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 "tertiary", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

tempered#14,438Tasmania#14,436timeless#14,442swearing#14,430

Similar misspelling depth

Headwords with a similar count of attested misspellings (12 here; floor ≥5).

vanguard12 variantssuspense12 variantsstrained12 variantssneakers12 variants

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

Source: FrequencyWords open word-frequency list