deduction
/dɪˈdʌkʃən/
"deduction" is a 9-letter English headword indexed on PlainSpell.
The verdict
“deduction” is a moderately-common English word, ranked #15,795 in English word frequency and used as a noun.
- #15,795
- frequency rank, English
- 9
- letters
- 14
- tracked misspellings
- 5
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - That which is deducted; that which is subtracted or removed.
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 | deduction |
| Language | English |
| Part of speech | Noun |
| IPA | /dɪˈdʌkʃən/ |
| Letters | 9 |
| Frequency rank | #15,795 |
| Misspellings tracked | 14 |
| Confusable pairs | 5 |
| Source | Wiktionary (kaikki.org) |
Where “deduction” sits in English frequency
Spelling & Dictionary Insight
The English entry for deduction is 9 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /dɪˈdʌkʃən/. Corpus data places it at rank #15,795 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 5 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 deduction, with forms such as "ddeduction", "ddeuction", and "dedcution". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 5 confusable-pair relationships, "detection", "depiction", "defection", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From Middle French déduction, from Latin deductio. Equivalent to deduct + -ion or deduce + -tion. The correct English form is deduction, spelled D-E-D-U-C-T-I-O-N.
Definition
- 1That which is deducted; that which is subtracted or removed.
- 2That which is deducted; that which is subtracted or removed.
- 3That which is deducted; that which is subtracted or removed.
- 4A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
- 5A process of reasoning that moves from the general to the specific, in which a conclusion follows necessarily from the premises presented, so that the conclusion cannot be false if the premises are true.
Etymology
From Middle French déduction, from Latin deductio. Equivalent to deduct + -ion or deduce + -tion.
This word in other languages
Common misspellings
Also misspelled as: ddeduction,ddeuction,dedcution,dedduction,deducction,deduciton,deducsion,deductino,deductionn,deductoin,deducttion,dedutcion,deudction,edduction
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of deduction - 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.
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 “deduction”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is D-E-D-U-C-T-I-O-N - every other letter order is a misspelling in standard orthography.
- Say it as /dɪˈdʌkʃən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “detection” - see the side-by-side comparison. deduction vs detection
- 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.