Where do you suppose the term "massacre'' came from that describes this event

Assuming you're referring to the "Boston Massacre," the word "massacre" was used because it sounded much worse than what it actually once--since it was easer to rally support around a cause that sounded like a "massacre" instead of just a few people being killed. 

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.

from the conditions of the working class in england by friedrich engels,the main idea is :

manchester's leaders hoped to oppress its working class to benefit factory owners.