The Spanish word 'azahar', meaning 'citrus blossom', traces its origins to Classical Arabic through the influence of Muslim rule in medieval Spain. It comes from the Classical Arabic word 'zahr' (زهر) meaning 'flowers', which evolved into the Andalusi Arabic form 'azzahár'. The Andalusi Arabic term was then borrowed into Spanish as 'azahar', where it took on the more specific meaning of citrus blossoms, particularly orange blossoms, which are known for their intense fragrance and use in perfumery and traditional Spanish cuisine.

While 'azahar' is a relatively unique word in Spanish derived from Arabic, there aren't many commonly used Spanish words that share its exact etymology. However, Spanish speakers might encounter it in compound words like 'agua de azahar' (orange blossom water) or in regional variations where it's used to describe fragrances or traditional preparations.

There aren't any common English words directly related to 'azahar' since it comes from Arabic rather than the shared Latin or Germanic roots that typically connect Spanish and English words. However, English speakers might encounter the term 'orange blossom water' or 'neroli', which refer to the same fragrant citrus flowers that 'azahar' describes in Spanish.