The term 'SURVIVOR GROUP' can be broken down into two crossword solutions: TRIBE (5 letters) and CASTAWAYS (9 letters). TRIBE refers to a group of people who are related by blood, marriage, or adoption, while CASTAWAYS refers to a group of people who have been stranded in an isolated area. In the context of the popular reality TV show 'SURVIVOR', TRIBE and CASTAWAYS refer to the groups of contestants who are competing against each other for a cash prize.