def clean_words(words, stop_words):
    """Remove stop words from words

    Args:
        words: A list of words
        stop_words: Comma separated string with stop words that should be
        removed from words.

    Returns:
        A list of words with stop words removed.
    """
    cleaned = []
    for word in words:
        if word.lower() not in stop_words.split(','):
            cleaned.append(word)
    return cleaned