lynch
Verb

to kill, usually by hanging, by mob action and without legal authority.

massacre
Noun

mass killing of large number of people.

middle class
Noun

economic classification whose members have incomes are not wealthy (upper class) or poor (lower class).

mob
Noun

a large and disorderly crowd of people, who are often take part in destructive activity like riots

segregation
Noun

the systemic separation of people based on race, religion, or caste.