input: Write a python function to filter out specific words from a list using list comprehension.
  assert filter_words(["apple", "orange", "banana", "grape"], ["apple", "grape"]) == ["orange", "banana"]
  assert filter_words(["cat", "dog", "mouse", "dog"], ["dog"]) == ["cat", "mouse"]
  assert filter_words(["red", "blue", "green", "yellow"], ["blue", "yellow"]) == ["red", "green"]
output: def filter_words(words, to_filter):
      return [word for word in words if word not in to_filter]