Compare and contrast these words and explain the differences of annihilate vs. decimate eradicate vs. massacre aski

The word annihilate usually means complete destruction, while decimation either means the same or it refers to the roman disciplinary practice of having nine tenths of a group of soldiers kill the remaining one tenth selected by a random drawing. Eradicate means to completely destroy all of a given group that may consist of people but can also be other things. Massacre on the other hand, just refers to the killing of a large number of people in an event.