If the meaning is the same "close, shut" and using same kanji, why is this?! is some more frequently used or?

閉める
閉まる
閉じる
閉ざす

or

始める
始まる

I do not get it?

This should help you.

http://www.guidetojapanese.org/learn/gra...transitive

Oh, this should teach me not to skip Tae Kim pages in future Thanks!