The following are some terms I've used in my blog entries; each is linked to an external webpage that provides a definition.
agoraphobia
autophobia
bipolar
bipolar, symptoms
comorbidity
depression
depression, symptoms
dysania
dysphoria - about.com
dysphoria - wiki
episode, i..e, "depressive episode" or "manic episode"
elevation (see "mania")
hypomania
mania / elevation
mania, symptioms
mixed episode
monophobia
obsessive-compulsive disorder
rapid cycling
seasonal affective disorder / holiday depression
social anxiety