What is another word for over-kill?
Pronunciation: [ˌə͡ʊvəkˈɪl] (IPA) 
When someone does something to an excessive extent or beyond what is necessary, we often refer to it as over-kill. However, there are other words and phrases we can use instead of using the same term repeatedly. For instance, you could use "overboard" to refer to someone who has gone too far in their actions. "Excess" and "extravagance" are also good choices. Other options may include "superfluous," "redundant," and "unnecessary." They help convey the same message and are less repetitive. It's always helpful to have a diverse set of synonyms in your vocabulary to convey the same meaning without being monotonous.
