Accidental is something that happens by chance but is not essential. It is basically unplanned or unintentional: My meeting with my ex-girlfriend was purely accidental.
Incidental is something happening as a result or in connection with something more important; unexpected: “The incidental costs of repairs for the car added up to much more than expected.”
Accidental & Incidental
![](https://wordpandit.com/wp-content/uploads/2012/06/13.-Usage-Tips1.png)