injection
/ɪnˈd͡ʒɛk.ʃən/
"injection" is a 9-letter English headword indexed on PlainSpell.
The verdict
“injection” is a regularly-used English word, ranked #7,238 in English word frequency and used as a noun.
- #7,238
- frequency rank, English
- 9
- letters
- 14
- tracked misspellings
- 13
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The act of injecting, or something that is injected.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | injection |
| Language | English |
| Part of speech | Noun |
| IPA | /ɪnˈd͡ʒɛk.ʃən/ |
| Letters | 9 |
| Frequency rank | #7,238 |
| Misspellings tracked | 14 |
| Confusable pairs | 13 |
| Source | Wiktionary (kaikki.org) |
Where “injection” sits in English frequency
Spelling & Dictionary Insight
The English entry for injection is 9 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɪnˈd͡ʒɛk.ʃən/. Corpus data places it at rank #7,238 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 14 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 14 likely wrong-spelling variants for injection, with forms such as "ijnection", "inejction", and "injcetion". 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 also participates in 13 confusable-pair relationships, "injector", "intention", "invention", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Borrowed from Middle French injection, from Latin iniectio. The mathematical sense is from French injection, introduced by Nicolas Bourbaki in their treatise Éléments de mathématique. Equivalent to inject + -ion. The correct English form is injection, spelled I-N-J-E-C-T-I-O-N.
Definition
- 1The act of injecting, or something that is injected.
- 2A specimen prepared by injection.
- 3A morphism from either one of the two components of a coproduct to that coproduct.
- 4The act of inserting materials like concrete grout or gravel by using high pressure pumps.
- 5The supply of additional funding to a person or a business.
- 6A relation on sets (X,Y) that associates each element of Y with at most one element of X.
- 7The insertion of program code into an application, URL, hardware, etc.; especially when malicious or when the target is not designed for such insertion.
- 8The act of putting a spacecraft into a particular orbit, especially for changing a stable orbit into a transfer orbit, e.g. trans-lunar injection.
- 9A function that maps distinct x in the domain to distinct y in the codomain; formally, a f: X → Y such that f(a) = f(b) implies a = b for any a, b in the domain.
- 10Something injected subcutaneously, intravenously, or intramuscularly by use of a syringe and a needle.
- 11Congestion (of a body part, with blood or other fluid), such as hyperemia.
- 12Fuel injection: the pressurized introduction of fuel into a cylinder.
- 13The act of throwing cold water into a condenser to produce a vacuum.
- 14The cold water thrown into a condenser to produce a vacuum.
Etymology
Borrowed from Middle French injection, from Latin iniectio. The mathematical sense is from French injection, introduced by Nicolas Bourbaki in their treatise Éléments de mathématique. Equivalent to inject + -ion.
This word in other languages
Common misspellings
Also misspelled as: ijnection,inejction,injcetion,injecction,injeciton,injecsion,injectino,injectionn,injectoin,injecttion,injetcion,injjection,innjection,nijection
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of injection - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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
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Using “injection”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-J-E-C-T-I-O-N - every other letter order is a misspelling in standard orthography.
- Say it as /ɪnˈd͡ʒɛk.ʃən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “injector” - see the side-by-side comparison. injection vs injector
- 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.