6. Pentheraphobia

Pentheraphobia: A fear of the mother-in-law
This is a phobia that most married people will be able to relate to. You might not be all that surprised to learn that there is a genuine phobia of the mother-in-law and it’s called pentheraphobia. While there are tons of jokes about how bad mothers-in-law are and while some married people seem to have real issues with them, the number of people who have a genuine phobia of them and suffer from pentheraphobia is likely pretty small.