Flagitious and Nefarious

Flagitious adjective - Extremely wicked, deeply criminal.

Nefarious is a synonym for flagitious in odious topic. In some cases you can use "Nefarious" instead an adjective "Flagitious", when it comes to topics like illegal.

Nefarious adjective - Not conforming to a high moral standard; morally unacceptable.

Flagitious is a synonym for nefarious in odious topic. You can use "Flagitious" instead an adjective "Nefarious", if it concerns topics such as bad, illegal.