How was Samson not in violation of his Nazirite Vow?

How was Samson not in violation of his Nazirite Vow?

Very closely related: How did Numbers 6:9 apply to Samson?
In Judges 13:5, Samson’s mother is told:

You will become pregnant and have a son whose head is never to be touched by a razor because the boy is to be a Nazirite,dedicated to God …

Is it Nebuchadnezzar or Nebuchadrezzar?

I found something a little bit confusing over the two ways in which the name of the king of Babylon was rendered in the book of Jeremiah.
For example, Jeremiah 28:11 renders it as Nebuchadnezzar:

And Hananiah spoke in the presence of all …