He tried to speak, but could no longer utter coherent words.

He nodded, managed to force out a single coherent word.

I have not gotten a coherent word from her since.

Paul marveled to hear coherent words come out of his own mouth.

Just now he spoke coherent words for the first time.

He seemed to be trying to say something that wouldn't quite form itself into coherent words.

At least he was the first to speak a coherent word.

It took a minute to extract from her the coherent words I needed.

He seemed ready to scream, unable to form coherent words.

He's pretty well off his head, for now, although he can form coherent words.