Pak means holy, exalted or worthy of complete devotion as one perfect in goodness and righteousness. Word pak also used for Pakistan. When we show Pakistan’s relations with others then we use prefix Pak, like Pak-Indo relations its means Pakistan’s relation with India.
Heaven may refer to the substantial heavens, the sky or the apparently endless expanse of the universe afar. This is the conventional literal meaning of the term in English, however since at least AD 1000. Heaven is typically also used to refer to an spirit world plane of existence (often held to exist in another realm) in various religions and pious philosophies, often described as the holiest possible place, accessible by people according to various standards of divinity, goodness, piety, faith etc.
Islam Is Our Religion. We Are Muslims. "Muslims" Mean One Who Obedient To Allah The Almighty. So , Our Every Action Should Be In Accordance With Allah's Will. We Should Act Upon The Teachings Of Islam. After this life, our new life will start in heaven. Pakheaven and hell are the places where we live after death according to our doings.
Absolutly heaven is holy, here both the word giving us religious meanings holy paradise, pakheaven.