castellum

noun

The verdict

“castellum” is uncommon French (frequency #93,580 among 8,609 “C” headwords), classed as a noun. The kind of spelling people second-guess.

#93,580
frequency rank, French
8,609
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Fort, forteresse, château fort, ville fortifiée.

Corpus desk

Index FR-castellum · castellum · French

castellum · rank #93,580 · 0 variants · 0 confusables

  • FREQ-RARE #93,580
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 8,609
  • PHOTO-FINISH castra

Nearest frequency peer: castra (+1 rank slots)

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.

Rangs de longue queue près de « castellum »

Bande clairsemée: les barres inversent le rang pour que le rare se lise plus court

corpus weight

What this shows Vue de longue queue: où « castellum » se situe face à des rangs français aussi rares.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for castellum
PropertyValue
Headwordcastellum
LanguageFrench
Part of speechNoun
Letters9
Frequency rank#93,580
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « castellum » en français

La fréquence va de la poignée de mots du quotidien (gauche) à la longue queue presque jamais vue (droite).castellumtombe dans cette queue de rareté:

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

Les tics avancent en logarithme; chacun est de l'ordre de dix fois plus rare. Voisins rares de la même bande: « castra » (#93,581), « Carélie » (#93,578), « catharisme » (#93,582). Parmi 8,609 lemmes en « C », « castellum » est au #93,580. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

castellum is uncommon French at frequency #93,580 among 8,609 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

No misspelling variants are generated for castellum in our index, a straightforward case of a spelling with little room for common typos. We don't track a confusable pairing for this entry, since nothing in our dataset looks or sounds close enough to cause mix-ups.

No documented word history exists for this headword, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct French form is castellum, spelled C-A-S-T-E-L-L-U-M.

Definition

  1. 1
    Fort, forteresse, château fort, ville fortifiée.
  2. 2
    Rempart, citadelle, asile, repaire, refuge.
  3. 3
    Réservoir d'un aqueduc, château d’eau.

Recorded use

Wiktionary examples

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

  1. templum Castoris fuit arx civium perditorum... castellum forensis latrocinii
  2. urbem philosophiae, mihi crede, proditis, dum castella defendis

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 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "castellum"?
"castellum" is spelled C-A-S-T-E-L-L-U-M.
What does "castellum" mean?
As a noun, "castellum" means: Fort, forteresse, château fort, ville fortifiée.
What language does "castellum" come from?
"castellum" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 French words by spelling shape

Same letter count and similar misspelling depth for "castellum", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 9 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list