Stronger/More forceful:
* Force: This is a more direct synonym, emphasizing physical or direct pressure.
* Coerce: Implies using threats or pressure to force someone to do something against their will.
* Oblige: Stronger than "require" but less forceful than "compel," suggesting a sense of duty or obligation.
* Constrain: To restrict or limit someone's freedom of action, often through external pressure.
* Enforce: To ensure that a rule or law is obeyed, often through authority or punishment.
More neutral/less forceful:
* Require: To need or demand something.
* Urge: To encourage or strongly suggest something.
* Induce: To persuade or influence someone to do something.
* Motivate: To give someone a reason or incentive to do something.
* Prompt: To cause something to happen or to encourage someone to act.
More formal/literary:
* Impel: To drive or push someone to act.
* Constrain: To restrict or limit someone's freedom of action.
* Exhort: To strongly urge or advise someone to do something.
The best word to use will depend on the specific situation and the intended effect.