list_of_words = ['08/20/2014', '10:04:27', 'pm', 'complet', 'vendor', 'per',
    'mfg/recommend', '08/20/2014', '10:04:27', 'pm', 'complet']
list_of_words = [x for x in list_of_words if not re.match(
    '[0-9]{2}[\\/,:][0-9]{2}[\\/,:][0-9]{2,4}', x)]
How to remove dates from a list in Python