Miscellaneous:

Hoarding: Although it is not considered a disorder yet, many people believe that the DSM-V will include Hoarding as an official disorder. Here is an introduction of Hoarding from the international OCD foundation. Link

Numerous drug induced disorders:
-Cocaine and other sitmulant induced delusions and hallucinations quite similar to that of Schizophrenia.
-Inhalent induced amnesia over long periods of abuse.