A speech problem is a condition that affects an individual's ability to communicate verbally. The four crossword solutions for the term 'speech problem' are LISP (4 letters), MONOTONY (8 letters), SLUR (4 letters), and STAMMER (7 letters). A lisp is a speech disorder in which a person has difficulty producing the letter 's' or 'z' correctly. MONOTONY is a lack of variation in pitch, volume, or intonation when speaking. A SLUR is a speech impediment in which a person speaks with a mumbled or indistinct pronunciation. Finally, stammering is a speech disorder in which a person has difficulty forming words due to involuntary repetitions or pauses.