Manslaughter is distinguished from involuntary manslaughter, which are both distinguished from vehicular manslaughter and other types of manslaughter. So too are varying degrees and qualifiers of assault, battery, and murder also distinguished from one another, which are even yet distinguished from mayhem, mutilation, etc. Different charges are used depending on culpability and severity.
I'm not sure why you're carrying on with this. You and I are both in agreement that I know what I'm talking about, and you don't.