Plural: -s after a vowel (casa → casas), -es after a consonant (ciudad → ciudades), -z → -ces (luz → luces).
Adjectives agree in gender and number and usually come after the noun: un coche rojo, una casa roja, unos coches rojos, unas casas rojas. Adjectives in -e or a consonant have one singular form (inteligente).
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