The difference between stammering and stuttering is purely terminology.
In the UK, the preferred word is stammering – and the condition of stammering can be defined as, “when someone repeats, prolongs or gets stuck when trying to say sounds or words.”
There have been many different theories suggesting where a stammer may come from, from a traumatic event in someone’s childhood, to an individual’s personality type.
A person’s stammer can be eased, or worsened by certain environments or situations, such as to whom they are speaking, the fear of who may be listening to them at that time, and the significance of a speaking situation, such as a presentation or meeting.