input: Write a function to identify and return palindromic words from a list.
  assert palindrome_words(['racecar', 'hello', 'level', 'world', 'deified']) == ['racecar', 'level', 'deified']
  assert palindrome_words(['madam', 'noon', 'python', 'civic', 'radar']) == ['madam', 'noon', 'civic', 'radar']
  assert palindrome_words(['apple', 'banana', 'refer', 'reviver', 'rotator']) == ['refer', 'reviver', 'rotator']
output: def palindrome_words(words):
      return [word for word in words if word == word[::-1]]