As an adjective unanimous
is based on unanimity, assent or agreement.
As a proper noun united is
(chiefly|british) any of many football teams formed by the amalgamation of smaller ones.
Based on unanimity, assent or agreement.
Sharing the same views or opinions, and being in harmony or accord.
- The debate went on for hours, but in the end the decision was unanimous .
- We were unanimous : the President had to go.
Joined into a single entity.
Involving the joint activity of multiple agents.