Relatives, informally, can be referred to as 'FOLKS' (5 letters) or 'fam' (3 letters). These terms are often used in casual conversation to refer to one's family members, such as parents, siblings, aunts, uncles, and cousins. They are also used to refer to extended family members, such as grandparents, great-grandparents, and other relatives. The use of these terms is a way to show familiarity and closeness with one's family.