how to rename password label on user edit page in Drupal?
If you're willing to do it in a module (you mentioned String Overrides module) you can easily do it with a simple hook_form_alter() in a small custom module.

function mymodule_form_user_edit_form_alter($form, &amp;$form_state) {
  $form['desired_element']['#label'] = t('My label');
  return $form;
}


This method uses hook_form_FORM_ID_alter(). This way you'll be able to set individual labels as you see fit, though.