Ombrophobia
Yes, the phobia of rain does exist.This phobia is called Ombrophobia.
There is no specific phobia of driving in the rain, but Ombrophobia & Pluviophobia both are fear of rain or of being rained on.
Your afraid of butter
Ichthyophobia.
Phasmophobia
From what I understand there is no specific phobia for people who are afraid of mail. Most just call it Mail Phobia...
Yes there is and it's called Ball phobia
Laughphobia is a phobia that means "afraid of laughing". Like when your friend fell out of their chair, you wouldn't laugh because your afraid to.. Anything that ends with the word "phobia" means afraid of.
Autophobia
Cyprindaphobia
dogaphobia
Heliophobia.