trajectory

/tɹəˈd͡ʒɛktəɹi/

//tɹəˈd͡ʒɛktəɹi// noun

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

"trajectory" is a 10-letter English headword indexed on PlainSpell.

The verdict

“trajectory” has 16 generated spelling variants in the English index at frequency #12,878. The variants make it a useful spelling check.

#12,878
frequency rank, English
3,151
“T” headwords
16
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The path an object takes as it moves.

Corpus desk

Index EN-trajectory · trajectory · English

trajectory · rank #12,878 · 16 variants · 0 confusables

  • FREQ-MID #12,878
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 16 variants
  • BOOK-MID 3,151
  • PHOTO-FINISH Tottenham

Nearest frequency peer: Tottenham (-2 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 “trajectory”

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

corpus weight

What this shows “trajectory” 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 trajectory
PropertyValue
Headwordtrajectory
LanguageEnglish
Part of speechNoun
IPA/tɹəˈd͡ʒɛktəɹi/
Letters10
Frequency rank#12,878
Misspellings tracked16
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “trajectory”

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

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “Tottenham” (#12,876), “TT” (#12,880), “thrilling” (#12,875). Among 3,151 “T” headwords, “trajectory” is #12,878. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 16 spelling variants around trajectory (IPA /tɹəˈd͡ʒɛktəɹi/), anoun. Corpus frequency is #12,878 among 3,151 “T” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 16 likely wrong-spelling variants for trajectory, with forms such as "rtajectory", "tarjectory", and "traejctory". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. We don't track a confusable pairing for this entry, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From New Latin trāiectōria f (“trajectory”) (used by Newton), the feminine of trāiectōrius (“of or pertaining to throwing across”), from Latin trāiectus (“thrown over or across”), past participle of trāiciō, from trans- (“across, beyond”) (see trans-) + iac… The correct English form is trajectory, spelled T-R-A-J-E-C-T-O-R-Y.

Definition

  1. 1
    The path an object takes as it moves.
  2. 2
    The path of a body as it travels through space.
  3. 3
    The ordered set of intermediate states assumed by a dynamical system as a result of time evolution.
  4. 4
    A course of development, such as that of a war or career.

Recorded use

Wiktionary examples

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

  1. The USA were dominant but, to England’s immense credit, they repeatedly rallied, refusing to fold. Indeed they could conceivably have gone in level at the interval had Naeher not made an acrobatic, stretching, fingertip save to divert Walsh’s 25-yard thunderbolt as it whizzed unerringly on its apparently inexorable trajectory towards the top corner.
  2. It is likely that the long evolutionary trajectory of Mycoplasma went from a reductive autotroph to oxidative heterotroph to a cell-wall–defective degenerate parasite. This evolutionary trajectory assumes the simplicity to complexity route of biogenesis, a point of view that is not universally accepted.

Etymology

From New Latin trāiectōria f (“trajectory”) (used by Newton), the feminine of trāiectōrius (“of or pertaining to throwing across”), from Latin trāiectus (“thrown over or across”), past participle of trāiciō, from trans- (“across, beyond”) (see trans-) + iaciō (“to throw”) (from Proto-Indo-European *(H)yeh₁- (“to throw, impel”)). Middle French and Middle English had trajectorie (“end of a funnel”), from Latin trāiectōrium.

This word in other languages

trayectoria(Español)trajectoire(Français)Flugbahn(Deutsch)trajetória(Português)

Common misspellings

Also misspelled as:

  • rtajectory
  • tarjectory
  • traejctory
  • trajcetory
  • trajecctory
  • trajecotry
  • trajectorry
  • trajectoryy
  • trajectoyr
  • trajectroy
  • trajecttory
  • trajetcory
  • trajjectory
  • trjaectory
  • trrajectory
  • ttrajectory

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of trajectory - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

rtajectory2tarjectory2traejctory2trajcetory2trajecctory1trajecotry2trajectorry1trajectoryy1
Edit distance from "trajectory"

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 "trajectory"?
"trajectory" is spelled T-R-A-J-E-C-T-O-R-Y. The IPA pronunciation is /tɹəˈd͡ʒɛktəɹi/.
What does "trajectory" mean?
As a noun, "trajectory" means: The path an object takes as it moves.
What are common misspellings of "trajectory"?
Common misspellings include "rtajectory", "tarjectory", "traejctory", "trajcetory", "trajecctory". The correct spelling is "trajectory".
How do you pronounce "trajectory"?
The IPA (International Phonetic Alphabet) transcription for "trajectory" is /tɹəˈd͡ʒɛktəɹi/. 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 "trajectory"?
From New Latin trāiectōria f (“trajectory”) (used by Newton), the feminine of trāiectōrius (“of or pertaining to throwing across”), from Latin trāiectus (“thrown over or across”), past participle of trāiciō, from trans- (“across, beyond”) (see tra... 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 "trajectory", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

underrated#12,881accusation#12,897adjustable#12,899resentment#12,849

Similar misspelling depth

Headwords with a similar count of attested misspellings (16 here; floor ≥5).

physiology16 variantsdisappearing16 variantsinternship16 variantsinformative16 variants

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

Source: FrequencyWords open word-frequency list