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):
unify
WordNet sense 4 (become one):
merge
From the ODE community, based on WordNet
add/edit