A word for strong arming is strong arm or aggressive and bullying.
Synonyms for strong arming are to bulldoze, startle, scare, browbeat, frighten, coerce, bully, terrorize and intimidate.
Strong arming is to force someone to do something.
When you strong arm someone to get out of your house you physically push that person out or force them out.
Bullies often strong arm others into giving them something they have such as their lunch money.
Powerful countries strong arm weaker countries into cooperating with alliances and treaties.
If you refer to someone's behavior as strong-arm tactics or methods, you disapprove of it because it consists of using threats or force in order to achieve something.
Strong arm tactics are methods or types of behavior which involves the use of force and threats to make people do what you want.
An example of strong arm in a sentence would be the police resorted to strong-arm tactics to break up the protest.