General synonyms:
* Troubling: This is a good general synonym for disturbing, implying something that causes worry or anxiety.
* Unsettling: This suggests something that makes you feel uncomfortable or uneasy.
* Alarming: This suggests something that causes fear or apprehension.
* Upsetting: This is a strong synonym, implying something that causes emotional distress.
* Disquieting: This implies something that makes you feel uneasy or unsettled, often in a subtle way.
* Uneasy: This describes a feeling of discomfort or apprehension.
More specific synonyms:
* Horrifying: This implies something that causes extreme fear or disgust.
* Repulsive: This suggests something that is physically or morally disgusting.
* Appalling: This implies something that is shocking or horrifying.
* Ghastly: This suggests something that is frightening or eerie.
* Grim: This suggests something that is bleak or depressing.
* Haunting: This implies something that stays with you in a disturbing way.
Informal synonyms:
* Creepy: This suggests something that is strange and unsettling.
* Weird: This suggests something that is unusual or strange.
* Eerie: This suggests something that is spooky or unsettling.
The best synonym for "disturbing" will depend on the specific context and the meaning you want to convey.