ailment (n.)

• abnormality
• affection
• affliction
• allergy
• atrophy
• blight
• complaint
• complication
• condition
• defect
• deformity
• disability
• disease
• disorder
• disquiet
• disquietude
• distemper
• endemic
• ferment
• handicap
• ill
• illness
• indisposition
• infirmity
• inquietude
• malady
• malaise
• morbidity
• morbus
• pathology
• queasiness
• restiveness
• restlessness
• rockiness
• seediness
• sickness
• syndrome
• turmoil