[u'Duration$', u'Noun$', u'Adjective$']

[u'Duration', u'Noun', u'Adjective']

[word.rstrip("$") for word in words]

[word+"$" for word in words]

>>> words = ['Duration$', 'Noun$', 'Adjective$']
>>> words = [word.rstrip("$") for word in words]
>>> words
['Duration', 'Noun', 'Adjective']
>>> [word+"$" for word in words]
['Duration$', 'Noun$', 'Adjective$']

words = [ x[:-1] for x in words ]

words = [u'Duration$', u'Noun$', u'Adjective$']
 result = [word[:-1] for word in words]

added_back = [word + '$' for word in result]

find_words = [i[:-1] for i in find_words]

find_words = [i.rstrip("$") for i in words]

find_words = [i + "$" for i in find_words]