stutterer
/ˈstʌtərər/Definitions
1. noun
A person who stutters, or has a speech disorder characterized by repetition, prolongation, or blocking of sounds.
“She was a stutterer and found it difficult to give speeches in front of a large audience.”
2. verb
To speak with a stutter, or to repeat words or sounds in speech due to a speech disorder.
“The child stuttered when trying to say the difficult word ‘elephant’.”