Is it possible to hava a Java alternative to NLTK in order to \'verbify\' words as can be seen in this question?
Convert words between verb/noun/adjective forms
A quick and dirty solution using wordnet can be like following.
>>>from ntlk.corpus import wordnet as wn
>>> wn.synsets('born')
[Synset('born.n.01'), Synset('bear.v.01'), Synset('give_birth.v.01'), Synset('digest.v.03'), Synset('bear.v.04'), Synset('bear.v.05'), Synset('bear.v.06'), Synset('hold.v.11'), Synset('yield.v.10'), Synset('wear.v.02'), Synset('behave.v.02'), Synset('bear.v.11'), Synset('hold.v.14'), Synset('have_a_bun_in_the_oven.v.01'), Synset('born.a.01'), Synset('natural.s.09')]
>>> wn.synsets('birth')
[Synset('birth.n.01'), Synset('birth.n.02'), Synset('parturition.n.01'), Synset('parentage.n.02'), Synset('birth.n.05'), Synset('give_birth.v.01')]
>>>
Here you can see that " Synset('give_birth.v.01')] " is a common result set which is "verb". So in this way you can find work around and see if there is any matching result, and convert born to birth or vice versa!