Pakistan vs. Hindustan: What's the Difference?

Pakistan and Hindustan Definitions
Pakistan
A country in South Asia formerly part of British India.
Hindustan
Northern region of India where Hinduism predominates.
Pakistan
A Muslim republic that occupies the heartland of ancient south Asian civilization in the Indus River valley; formerly part of India; achieved independence from the United Kingdom in 1947
Hindustan
Northern region of India where Hinduism predominates