def check_words(dictionary_, start_word, stop_word):
    """Check if both words are defined in the dictionary.__doc__

    If either word is not found, an appropriate warning will be printed
    to stdout

    :param dictionary_ : dictionary object
    :type: Dictionary
    :param start_word: Starting word
    :type: string
    :param stop_word: Stopping word
    :type: string
    :returns: True if both words are defined, False othwerise
    :rtype: bool

    """
    if dictionary_.is_real_word(start_word) is False:
        print("Word {} not found in the dictionary".format(start_word))
        return False
    if dictionary_.is_real_word(stop_word) is False:
        print("Word {} not found in the dictionary".format(stop_word))
        return False
    return True