What is the difference between Enlightenment and Nibbana? Is there a difference between Enlightenment and Nibbana?
Enlightenment is the insight knowledge that cuts through &amp; extinguishes the mind's defilements (cravings) of greed, hatred or delusion.

Nibbana is final peace or coolness that is experienced after the 'fires' of greed, hatred &amp; delusion have been extinguished. 

Enlightenment is the cause which allows (the pre-existing but hidden) Nibbana to be experienced. 

This process is described in the Anatta-Lakkhana Sutta


  Seeing (impermanence, unsatisfactoriness &amp; not-self) thus , the well-instructed disciple of the noble ones grows disenchanted with form, disenchanted with feeling, disenchanted with
  perception, disenchanted with fabrications, disenchanted with
  consciousness. Disenchanted, he becomes dispassionate. Through
  dispassion, he is fully released. With full release, there is the knowledge, 'Fully released.' 


The 'seeing thus' is enlightenment. 'Becoming dispassionate' (end of craving) is Nibbana. 'Fully released' is liberation (which is also Nibbana). The knowedge 'fully released' is enlightenment, in clearly knowing the end of craving is Nibbana.