| A | B |
| pyromaniac | one who has a passion for fire |
| dipsomaniac | one who is compelled to drink |
| megalomaniac | one who has delusions of grandeur |
| monomaniac | one who has one obsession |
| kleptomaniac | one who has a compulsion to steal |
| hypochondriac | one who has imaginary ills |
| amnesiac | one who suffers from a loss of memory |
| somnambulist | one who sleepwalks |
| insomniac | one who has trouble sleeping |
| schizophrenic | one who has a split personality |
| melancholiac | one who is depressed and perhaps suicidal |
| paranoiac | one who has delusions of persecution |
| bipolar | having alternating moods of depression and excitability |
| claustrophobia | fear of crowded or confined places |
| agoraphobia | fear of open spaces and public areas |
| acrophobia | fear of heights |
| Oedipus complex | a boy is hostile to his father and in love with his mother |
| Electra complex | a girl is hostile to her mother and in love with her father |