input: Write a function to filter words from a list using another list as filter.
  assert word_filter(["apple", "banana", "cherry", "date"], ["banana", "date"]) == ["apple", "cherry"]
  assert word_filter(["cat", "dog", "elephant", "frog"], ["dog", "frog", "elephant"]) == ["cat"]
  assert word_filter(["red", "blue", "green", "yellow"], ["blue", "yellow"]) == ["red", "green"]
output: def word_filter(words, filter_list):
      return [word for word in words if word not in filter_list]