S: (n) Ku Klux Klan, Klan, KKK (a secret society of white Southerners in the United States; was formed in the 19th century to resist the emancipation of slaves; used terrorist tactics to suppress Black people)
S: (n) construction, building (the commercial activity involved in repairing old structures or constructing new ones) "their main business is home construction"; "workers in the building trades"