Possible Clues:

• Germaphobia may be a symptom of it, for short
• It typically involves repetitive behavior, briefly
• Hoarder's possible condition, briefly
• Explanation for some tics, in brief
• Condition for some germophobes, briefly
• Condition that may involve checking
• Condition that may involve repetitive urges, for short
• What psychotherapy can treat, in brief
• "Monk" condition, briefly
• Repeating words silently may be a symptom of it: Abbr