Act is a derived term of enact.

Act is a related term of enact.

In transitive terms the difference between enact and act

is that enact is to do; to effect while act is to feign.

As verbs the difference between enact and act

is that enact is to make (a bill) into law while act is to do something.

As nouns the difference between enact and act

is that enact is purpose; determination while ACT is a certain standardized college admissions test in the United States, originally called the {{term||American College Test}}.

As a proper noun ACT is

initialism of Australian Capital Territory|lang=en, a federal territory of Australia.