The Spanish word 'garnacha', which refers to a type of wine and grape variety, comes from the Italian word 'vernaccia', which also means a type of wine. The Italian term itself derives from Vernaccia, a town in Liguria, Italy, where this wine variety originated. The Spanish adaptation shows a typical sound change from 'v' to 'g' that occurred as the word traveled from Italian to Spanish.

There aren't many common Spanish words directly related to 'garnacha' since it's a specific wine term that entered Spanish directly from Italian.

In English, this grape variety is known as 'Grenache', which is borrowed from French but ultimately shares the same origin as Spanish 'garnacha'. English wine terminology often preserves this word in its Spanish form 'garnacha' when specifically referring to Spanish wines made from this grape variety.