import enchant # https://pythonhosted.org/pyenchant/
import re

FILENAME='file.pdf'

d = enchant.Dict("en_US")
with open(FILENAME, 'rb') as f:
    menu = f.read()

m = re.sub('[^a-zA-Z]+', ' ', menu)
words = filter(lambda w: len(w)>1 and d.check(w), m.split(' '))