Another word for life zone may be habitable zone (it's "habital zone" for creationists), goldilocks zone, and there might be more.
another word for "a way of life" is culture
life ending
Torrid zone
Deadly, look it up in a thesaurus
Mech would be one for Machine
A zonulet is another word for a zonule, a small zone.
another word for "a way of life" is culture
The zone in which life occurs on the Earth is called the biosphere.
Battlezone, frontline, combat area, battle ground, or war zone. Those words mean combat zone.
Another word for region is area zone, district, domain, environs, locale, sector, territory, vicinity...
Theater of war Combat zone Arena Trenches
Another name for a life jacket would be a PFD.
Another word for organism would be: Animal Life or Environmental Life! Hope this helps! :)
life ending
afterlife
Another word for reinventing yourself is "transforming."
Symbiotic