How to get all the hyponyms of a word/synset in python nltk and wordnet?

by 
from nltk.corpus import wordnet as wn
vehicle = wn.synset('vehicle.n.01')
typesOfVehicles = list(set([w for s in vehicle.closure(lambda s:s.hyponyms()) for w in s.lemma_names()]))

This will give you all the unique words from every synset that is a hyponym of the noun “vehicle” (1st sense).

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