>>> langcheck.augment.synonym('aaaa')
LookupError:
**********************************************************************
Resource averaged_perceptron_tagger_eng not found.
Please use the NLTK Downloader to obtain the resource:
>>> import nltk
>>> nltk.download('averaged_perceptron_tagger_eng')
For more information see: https://www.nltk.org/data.html
Attempted to load taggers/averaged_perceptron_tagger_eng/