Nouns are one of the most important parts of speech. They pop up as the subjects of our sentences and the objects of our verbs. They describe the people, places, or things in our lives. The letter X may not be as popular as the consonant S or the vowel A, but we can name at least 50 nouns that start with X. Ready to learn to play the xalam and identify the xanthophane in your favorite fall leaves?