The word Achorn is not a commonly used word in English, but it is often misspelled as "Acorn," which refers to the fruit of an oak tree. The correct spelling is pronounced as /ˈeɪkɔːrn/ with the stress on the first syllable "ay". The "ch" in Achorn makes the /k/ sound, similar to the "c" in "cat". Therefore, it is important to accurately spell words, including less commonly used ones, in order to effectively communicate one's thoughts and ideas.