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PlainSpell

capstone

/ˈkæpˌstoʊn/noun, verb

capstone is spelled C-A-P-S-T-O-N-E: 8 letters and 2 syllables. It appears about once in every 2 million words in written English, the 42,145th most frequent word form (wordfreq, 2021 data). As a noun, capstone means “Any of the stones making up the top layer of a wall; a coping stone” (English Wiktionary, September 2026). The plural of capstone is capstones.

How many letters and syllables are in capstone?

Letters8: C-A-P-S-T-O-N-E
Syllables2 (from its American pronunciation)
In writingabout once in every 2 million words; the 42,145th most frequent word form
Wrong spellings searchednone measured in search
Same letters

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); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is capstone?

Capstone appears about once in every 2 million words in written English, the 42,145th 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 capstone?

  • US /ˈkæpˌstoʊn/

Capstone has 2 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: LL-Q1860_(eng)-Wodencafe-capstone.wav, Wikimedia Commons (author and licence on each file's page).

What rhymes with capstone?

No other word on PlainSpell ends in the same sounds as capstone (/æpstoʊn/).

Spelled with the same letters in another order: opencast.

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 capstone

  • capstones plural, present, singular, he/she/it
  • capstoning participle, present
  • capstoned participle, past

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

What does capstone mean?

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

noun

  1. 1

    Any of the stones making up the top layer of a wall; a coping stone.

  2. 2

    A crowning achievement, culmination or finishing touch.

verb

  1. 1

    To complete as a crowning achievement; to top off.

  2. 2

    USinformalTo train in the Capstone Military Leadership Program.

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

Capstone in Spanish, French, German and Portuguese

LanguageWords
GermanMauerkronenstein (any of the stones making up the top layer of a…), Höhepunkt, Krönung (a crowning achievement)
Spanishcoronamiento, coronación (any of the stones making up the top layer of a…), logro coronador, culminación, curso culminante, curso apoteósico (a crowning achievement)
Frenchcouronnement (a crowning achievement)

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 capstone come from?

From Middle English capston; equivalent to cap + stone.

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

What to look up after capstone