overkill

As nouns the difference between taxonomy and overkill

is that taxonomy is the science or the technique used to make a classification while overkill is (literally) a destructive capacity that exceeds that needed to destroy an enemy; especially with nuclear weapons.

As a verb overkill is

to destroy something with more (nuclear) force than is required.

Winterkill is a related term of overkill.

In transitive terms the difference between overkill and winterkill

is that overkill is to destroy something with more (nuclear) force than is required while winterkill is to kill by the conditions of winter, especially the effect of the cold, freezing.