family has 19 distinct synonyms spread across 7 of its 8 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a social unit living together
“he moved his family to Virginia”
primary social group; parents and children
“he wanted to have a good job before starting a family”
a collection of things sharing a common attribute
“there are two classes of detergents”
(biology) a taxonomic group containing one or more genera
“sharks belong to the fish family”
a loose affiliation of gangsters in charge of organized criminal activities
an association of people who share common beliefs or activities
“the message was addressed not just to employees but to every member of the company family”
Synonyms, antonyms and the broader and narrower relations for family come from Princeton University’s WordNet. Full sources and licences.