lexicologist.
Racist
Morbid.
crazy cat person
Custy
a shoeaveor
A person that loves all things French might be called a Francophile.
Well it depends. If you're a man and you're obsessed with another man well it's called being gay. And if you're a girl and you're obsessed with men it's called love!
A person that hunts dinosaur bones is called a paleontologist.
It could be a chronophile (one who is obsessed about time).
an obsessed person is somebody who only thinks of one thing and does it all the time
Hydromaniac
Obsessed!