Skip to main content
App StoreGoogle Play

castillo

castillo is a Spanish noun meaning castle (a large building that is fortified and contains many defences). It is the 1,199th most common word in Spanish, which puts it at CEFR level A2. It turns up in about 1 in 806 sentences of real Spanish prose.

1,199

rank

of 5,000

A2

CEFR level

by frequency

1 in 806

sentences

contain it

76.9%

running total

of a book covered

Running total is cumulative: knowing castillo and every Spanish word above it covers 76.9% of the running words in a real book.

Is castillo worth learning now?

castillo sits at rank 1,199, past the first thousand words that cover 75.32% of a book on their own. It is a A2 word: worth learning once the commonest thousand are secure, and you will meet it often enough at that point to make it stick.

Frequency is the honest guide to order, not to method. A word learned from a list on its own fades; the same word met inside a sentence you wanted to read stays. Check a Spanish text against the CEFR bands to see whether what you are reading is at your level.

Spanish words of the same frequency

See all 5,000 most common Spanish words, or look up any of the 16,244 Spanish words Einlang ranks.

Where this comes from

The rank is measured, not copied: 394 million words of subtitle dialogue for how Spanish is spoken, and 45 public-domain books for how it is written. Conjugations and plurals count towards the word they belong to, so castillo is ranked as a word rather than as a spelling. The meaning and part of speech come from Wiktionary. Generated 2026-07-27.

Also on Einlang: the most common French words and the most common German words.

Meet castillo where it actually lives

Photograph any Spanish page and Einlang turns it into vocabulary, grammar notes and drills for that exact page - so words like castillo arrive in a sentence you cared about instead of on a flashcard on their own.

Try Einlang free