capstone

/ˈkæpˌstoʊn/

//ˈkæpˌstoʊn// noun

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

"capstone" is a 8-letter English headword indexed on PlainSpell.

The verdict

“capstone” has 12 generated spelling variants in the English index at frequency #42,048. The variants make it a useful spelling check.

#42,048
frequency rank, English
5,599
“C” headwords
12
tracked misspellings
1
confusable pair

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Any of the stones making up the top layer of a wall; a coping stone.

Corpus desk

Index EN-capstone · capstone · English

capstone · rank #42,048 · 12 variants · 1 confusable

  • FREQ-MID #42,048
  • LEN-LONG 8 letters
  • VOW-3 3 vowels
  • CONFUS-LOW 1 pairs
  • VAR-MID 12 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH capitalise

Nearest frequency peer: capitalise (-1 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 “capstone”

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

corpus weight

What this shows “capstone” 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

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

capstone vs Capone
63% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for capstone
PropertyValue
Headwordcapstone
LanguageEnglish
Part of speechNoun
IPA/ˈkæpˌstoʊn/
Letters8
Frequency rank#42,048
Misspellings tracked12
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “capstone”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).capstonelands here:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “capitalise” (#42,047), “carpeting” (#42,049), “Calabria” (#42,046). Among 5,599 “C” headwords, “capstone” is #42,048. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 12 spelling variants around capstone (IPA /ˈkæpˌstoʊn/), anoun. Corpus frequency is #42,048 among 5,599 “C” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 12 likely wrong-spelling variants for capstone, with forms such as "acpstone", "cappstone", and "capsotne". 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 1 confusable-pair relationship, "Capone", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English capston; equivalent to cap + stone. The correct English form is capstone, spelled C-A-P-S-T-O-N-E.

Definition

  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.

Recorded use

Wiktionary examples

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

  1. “You see, I’ve never had a girl friend,” I added, by way of topping the obelisk of silliness with the capstone of fatuity.
  2. Success of the Apollo program has been the capstone to a series of significant accomplishments for the United States in space in a broad spectrum of manned and unmanned exploration missions and in the application of space techniques for the benefit of man.

Etymology

From Middle English capston; equivalent to cap + stone.

Synonyms

capestanecopestone

This word in other languages

coronamiento(Español)couronnement(Français)Höhepunkt(Deutsch)

Common misspellings

Also misspelled as:

  • acpstone
  • cappstone
  • capsotne
  • capsstone
  • capstnoe
  • capstoen
  • capstonne
  • capsttone
  • captsone
  • casptone
  • ccapstone
  • cpastone

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of capstone - 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.

acpstone2cappstone1capsotne2capsstone1capstnoe2capstoen2capstonne1capsttone1
Edit distance from "capstone"

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 "capstone"?
"capstone" is spelled C-A-P-S-T-O-N-E. The IPA pronunciation is /ˈkæpˌstoʊn/.
What does "capstone" mean?
As a noun, "capstone" means: Any of the stones making up the top layer of a wall; a coping stone.
What words are commonly confused with "capstone"?
"capstone" is commonly confused with "Capone". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "capstone"?
The IPA (International Phonetic Alphabet) transcription for "capstone" is /ˈkæpˌstoʊn/. 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 "capstone"?
From Middle English capston; equivalent to cap + stone. 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 "capstone", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

Calabria#42,046Carvalho#42,050buckling#42,039chiseled#42,058

Similar misspelling depth

Headwords with a similar count of attested misspellings (12 here; floor ≥5).

bloodless12 variantscoursing12 variantsdauntless12 variantsassembler12 variants

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

Source: FrequencyWords open word-frequency list