consanguines - "blood" relatives, people related by birth: parents, siblings, grandparents, parents' siblings, cousins.
affines - "in-laws" people related by marriage: siblings' husbands or wives, spouses parents, spouses siblings, parents' siblings' spouses.
kin group - Organized, cooperative group based on kinship relationships (including fictive - "honorary" relatives or adoption).
nuclear family - consists of married couple, together with unmarried children in one kind of kin group, living together, sharing wealth and property, relying on each other for emotional support, pool labor and resources to support family...
extended family - culturally recognized relatives of varying degrees of distance, no clear social boundaries.
household - Domestic group, one or more nuclear families living in one physical space.