1) Act as one 2) Commix 3) Concoct 4) Consociate 5) Consolidate 6) Consubstantiate 7) Federalize 8) Immingle 9) Integrate 10) Intermingle 11) Intermix 12) Join 13) Marry 14) Merge 15) Mingle 16) Reunify 17) Unite 1) Amalgamate 2) Become one 3) Bring together 4) Cause to be one 5) Cause to become one 6) Combine 7) Compact 8) Concentrate 9) Conjoin 10) Consolidate 11) French word used in English 12) Fuse 13) Integrate 14) Join or combine 15) Make compact 16) Make into a unit 17) Make one 18) Merge 19) Paper over differences 
[formerly Siemens Enterprise Communications] ...
• (v. t.) To cause to be one; to make into a unit; to unite; to view as one.
[v] - become one
to make or become a single unit; unite: to unify conflicting theories; to unify a country.
bring together for a common purpose or action act in concert for a common purpose or belief join or combine