Caro is a Spanish word that translates to "expensive" or "costly" in English. There are a variety of synonyms available for the word caro in Spanish. Some of the common synonyms used for the word caro include costoso, valioso, precioso, and ostentoso. These synonyms denote the high monetary value of something and are often used in the context of luxury goods and services. Other synonymous words for caro include oneroso, elaborado, and exorbitante, which can denote an expensive or arduous undertaking or an overpriced item. Regardless of the particular synonym used, the general idea is that the object or service in question is of high value and comes at a high price.