shared has 3 distinct synonyms spread across 1 of its 2 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. Its one recorded opposite is unshared.
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.
have in common; held or experienced in common
“two shared valence electrons forming a bond between adjacent nuclei”
distributed in portions (often equal) on the basis of a plan or purpose
Synonyms, antonyms and the broader and narrower relations for shared come from Princeton University’s WordNet. Full sources and licences.