WordNet sense 1 ((of political bodies) not controlled by outside forces):

self-governing, sovereign

WordNet sense 2 (able to act at will; not hampered; not under compulsion or restraint):

free

WordNet sense 3 ((of persons) free from external control and constraint in e.g. action and judgment):

self-reliant, self-directed

WordNet sense 4 (free from external control and constraint):

independent