castello

noun

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

The verdict

“castello” is uncommon English (frequency #57,925 among 5,599 “C” headwords), classed as a noun. The kind of spelling people second-guess.

#57,925
frequency rank, English
5,599
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A municipality of San Marino.

Corpus desk

Index EN-castello · castello · English

castello · rank #57,925 · 0 variants · 0 confusables

  • FREQ-RARE #57,925
  • LEN-LONG 8 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH carting

Nearest frequency peer: carting (-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.

Long-tail ranks near “castello”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “castello” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for castello
PropertyValue
Headwordcastello
LanguageEnglish
Part of speechNoun
Letters8
Frequency rank#57,925
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “castello” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).castellofalls in this rarity band:

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

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “carting” (#57,924), “Castilian” (#57,926), “catastrophically” (#57,927). Among 5,599 “C” headwords, “castello” is #57,925. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

castello is uncommon English at frequency #57,925 among 5,599 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A municipality of San Marino.".

Our edit-distance generator produced no likely misspellings for castello, a straightforward case of a spelling with little room for common typos. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: Borrowed from Italian castello. The correct English form is castello, spelled C-A-S-T-E-L-L-O.

Definition

  1. 1
    A municipality of San Marino.

Recorded use

Wiktionary example

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

  1. The bus wound its way up into San Marino, passing through the various small castellos that add up to form the diminutive country, […]

Etymology

Borrowed from Italian castello.

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 "castello"?
"castello" is spelled C-A-S-T-E-L-L-O.
What does "castello" mean?
As a noun, "castello" means: A municipality of San Marino.
What is the origin of the word "castello"?
Borrowed from Italian castello. 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 "castello", not the corpus desk frequency band.

Same letter count

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

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

Source: FrequencyWords open word-frequency list