What is another word for authoritative?

Here are some words that can be used as synonyms for authoritative, depending on the specific context:

Formal and positive:

* Commanding

* Decisive

* Definitive

* Eminent

* Expert

* Influential

* Leading

* Respected

* Strong

* Valid

Formal and negative:

* Dogmatic

* Imperious

* Overbearing

* Tyrannical

Informal:

* Bossy

* Controlling

* Know-it-all

* Powerful

Other:

* Credible

* Reliable

* Trustworthy

The best synonym for "authoritative" will depend on the specific situation and the desired tone.