For "to say something":
* Speak
* Say
* Pronounce
* Articulate
* Enunciate
* Voice
* Declare
* Express
* Emit
* Shout
* Whisper
For "complete or absolute":
* Total
* Absolute
* Complete
* Perfect
* Entire
* Full
* Thorough
* Extreme
* Outright
* Unqualified
For "to make a sound":
* Emit
* Produce
* Make
* Give forth
* Release
The best synonym will depend on the specific context of your sentence.