Create taxonomy term with same name as Post Title

functions.php

// Create taxonomy term with same name as Post Title
function create_course_name($post_ID) {
  global $wpdb;
      $cat = get_the_title($post_ID); // grabs the post title
      wp_set_object_terms($post_ID, $cat, 'course_name'); //course_name is the taxonomy slug
}
add_action('save_post', 'create_course_name'); // This creates the term on Save