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PlainSpell

deduction

/dɪˈdʌkʃən/noun

deduction is spelled D-E-D-U-C-T-I-O-N: 9 letters and 3 syllables. It appears 2.9 times per million words in written English, the 15,798th most frequent word form (wordfreq, 2021 data). People search “deduction vs induction” about 110 times a month (Bing, United States). As a noun, deduction means “That which is deducted; that which is subtracted or removed” (English Wiktionary, September 2026). The plural of deduction is deductions.

How many letters and syllables are in deduction?

Letters9: D-E-D-U-C-T-I-O-N
Syllables3 (from its American pronunciation)
In writing2.9 times per million words; the 15,798th most frequent word form
Wrong spellings searchednone measured in search
Pairs people search
Rhymes with

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is deduction?

Deduction appears 2.9 times per million words in written English, the 15,798th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How do you pronounce deduction?

  • UK /dɪˈdʌkʃən/
  • UK /dɪˈdʊkʃən/
  • US /dɪˈdʌkʃən/

Deduction has 3 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-deduction.ogg, Wikimedia Commons (author and licence on each file's page).

Words people confuse with deduction

Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).

deduction vs induction110 B

Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).

What rhymes with deduction?

3 words on PlainSpell end in the same sounds as deduction from its last stressed vowel (/ʌkʃən/):

Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).

Forms of deduction

  • deductions plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does deduction mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    That which is deducted; that which is subtracted or removed.

    Near-synonyms: extract, reduction; see also Thesaurus:decrement

  2. 2

    A sum that can be removed in tax calculations, usually from the taxable amount; something that is written off.

    standard deduction

  3. 3

    A sum withheld from an employee's pay for the purpose of paying tax.

  4. 4

    A conclusion; that which is deduced, concluded or figured out.

    He arrived at the deduction that the butler didn't do it.

  5. 5

    The ability or skill to deduce or figure out; the power of reason

    Through his powers of deduction, he realized that the plan would never work.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Deduction in Spanish, French, German and Portuguese

LanguageWords
Frenchdéduction (that which is subtracted or removed), précompte (sum withheld from pay for the purpose of paying…)
GermanAbzug (that which is subtracted or removed), Quellensteuerabzug (sum withheld from pay for the purpose of paying…), Werbungskosten (sum that can be removed from tax calculations), Ableitung, Herleitung (process of reasoning), Schlussfolgerung (conclusion)
Portuguesededução (that which is subtracted or removed)
Spanishdeducción (that which is subtracted or removed)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does deduction come from?

From Middle French déduction, from Latin deductio. Equivalent to deduct + -ion or deduce + -tion.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after deduction