def split_word_at_pipe(word):
    """ This function splits a word separated by a | symbol

        Args:
            word (str): Word with a pipe symbol

        Returns:
            A list of split items

        Examples:
            >>> split_word_at_pipe('Bilderbuch|Absturz')
            ['Bilderbuch', 'Absturz']
            >>> split_word_at_pipe('Bilderbuch')
            ['Bilderbuch', 'Bilderbuch']

    """

    if '|' in word:
        return word.split('|')

    else:
        return [word, word]