The Spanish word 'carioca' comes from Portuguese 'carioca', which refers to a native of Rio de Janeiro. The Portuguese term itself has fascinating indigenous roots, being a compound word from the Tupi language. It combines two Tupi words: 'kari' meaning 'white man' and 'oca' meaning 'house'. Over time, this compound evolved to specifically refer to the residents of Rio de Janeiro, reflecting the historical interaction between indigenous Tupi people and European settlers in the region.

Since 'carioca' entered Spanish directly from Portuguese and has its roots in the indigenous Tupi language of Brazil, there aren't any simpler or more common Spanish words that share its etymology.

There aren't any common English words directly related to 'carioca' since it comes from the Tupi indigenous language of Brazil. However, English has borrowed the word 'carioca' itself, using it with the same meaning to refer to a native of Rio de Janeiro, and it's also known internationally through the Brazilian dance style 'Carioca'.