"I don't have words" vs "I have no words"

[Sawaab]

what is the difference between these two phrases

"I don`t have words"

"I have no words"?

Thank you

[Mister Micawber]

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No difference in meaning.
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_________________
Native English teacher at Mister Micawber's

[Sawaab]

Ok.
Thanks, but is there any grammatical difference ?
Is the later one informal ?

thanks again

[Mister Micawber]

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No.
_________________
Native English teacher at Mister Micawber's

[Cerberus™]

"I have no words" is perhaps used more often in expressions, like "I have no words for your behaviour, young lady. Go to your room immediately." Then "words" means "anything to say", not several separate words.