| schism | A split or division between strongly opposed sections or parties, caused by differences in opinion or belief | |
| scintillating | Sparkling or shining brightly | |
| sclerotic | Relating to or having sclerosis, an abnormal hardening of body tissue | |
| scofflaw | A person who flouts the law, especially one who fails to pay fines owed | |
| scotch | To put an end to; to prevent; to decisively defeat or terminate | |
| scrutinize | To examine something very carefully in order to discover information or details | |
| scuffle | A short, confused fight or struggle at close quarters | |
| scurrilous | making or spreading scandalous claims about someone with the intention of damaging their reputation | |
| secretes | To produce and discharge a substance, especially from the cells or glands in the body | |
| sectarian | Denoting or concerning a sect or sects | |