A splutterer is someone who speaks or talks incoherently or with a stutter. Synonyms for the word include stammerer, stutterer, babbler, mumbler, and stumbler. A stammerer is someone who has difficulty speaking fluently due to uncertainty or nervousness. A stutterer is someone who has difficulty producing a smooth and continuous flow of speech due to a neurological or muscle-related condition. A babbler is someone who speaks incessantly without making much sense. A mumbler is someone who speaks in a low or indistinct voice. Finally, a stumbler is someone who speaks hesitantly or haltingly due to a lack of confidence or proficiency in the language.