What is a synonym for minuteman?

There isn't a single perfect synonym for "minuteman" because it holds a specific historical and cultural meaning. However, here are some words that capture aspects of the term:

General synonyms for a person ready for action:

* Volunteer

* Patriot

* Militiaman

* Soldier

* Citizen soldier

* Defender

* Ready reserve

Words emphasizing readiness:

* Alert

* Vigilant

* Prepared

* On call

* Standing by

Words emphasizing speed:

* Quick

* Swift

* Rapid

* Expeditious

The best synonym will depend on the specific context you are using it in.