Unites

22 clues
Weds
Joins
Links
Fuses
Glues
Merges
Marries
Combines
Hooks up
Coalesces
Makes one
Amalgamates
Confederates
Joins forces
Consolidates
Puts together
Gets together
Joins together
Pulls together
Works together
Bands together
Brings together
Similar answers:
Aaronites
Abates
Abbreviates
Abdicates
Ablates
Abnegates
Abominates
Abrogates
Abruptest
Absolutes
Absolutesilence
Abtesting
Accelerates
Accentuates
Accretes
Acerbates
Acesatest
Acestes
Acetates
Achates