救星

jiu4 xing1

lit. saving star (cf star of Bethlehem in biblical nativity story); fig. savior (individual or organization); liberator; emancipator; knight in shining armor; cf Mao Zedong in north Shaanxi folk song The East is red 东方红

救援

jiu4 yuan2

to save; to support; to help; to assist

援救

yuan2 jiu4

to come to the aid of; to save; to rescue from danger; to relieve

解救

jie3 jiu4

to rescue; to help out of difficulties; to save the situation

救

jiu4

to save; to assist; to rescue