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Synonyms for Unite (same or very similar meaning)

WordNet sense 1 (have or possess in combination):
combine, combine

WordNet sense 2 (be or become joined or united or linked):
connect, join, link

WordNet sense 3 (bring together for a common purpose or action or ideology or in a shared situation):

WordNet sense 4 (become one):

From the ODE community, based on WordNetadd/edit