There is hundreds of phobias, too many to list here. Try looking on the internet for a complete list. I believe 99.9% of the phobias are not in use, they are just there to exist.
The link below a lists of all different phobias from A to Z. There is a site called Phobialist that has a long list of phobias that people can suffer from. The website Fearintofreedom also has a list as well as information about overcoming phobias.
You can find a link to a list of phobias in related links.
A phobia is an irrational fear. So rational fears are not phobias - being afraid of bears is a rational fear if your are in bear country, but an irrational one if you are at a zoo. Non-phobias don't have names, and so cannot be listed.
If you click on 'related links' below, the link will take you to a list of phobias. I don't know if it is a 'full' list but there quite a lot.
It would be WAY too hard to list all the phobias in the world.... so I can just give you a website to go too. www.phobialist.com and if you go on that every phobia possible is there.
Catoptrophobia. Here is a list of a bunch: http://psychology.about.com/od/phobias/a/phobialist.htm
It is just something made up, and isn't a phobia at all. See the related link for a list of Phobias..
The phobia of phobias is Phobophobia.
There are very easy ways to find these online! Here is a site for 10 very common phobias...http://www.phobias-help.com/Ten_Most_Common_Phobias.html Here is a site with a list of many different phobias on it. http://www.stuartxchange.org/Phobias.html
Phobias are an aspect of psychology, which is considered a science. So yes, phobias are a science of sorts
Type in List of Phobias on Google to find out.In the meantime, you may invent Ergophobia to mean fear of work.
The name of the phobia related to the fear of teenagers is Ephebiphobia.See Web Links for a list of some phobias and their names