| Term | Definition |
| acrophobia | abnormal fear of being in high places |
| agoraphobia | abnormal fear of being in crowds, public places, or open areas |
| audiophile | one especially interested in high-fidelity sound reproduction |
| balletomania | extreme enthusiasm for the ballet |
| bibliomania | craze for acquiring books, especially rare ones |
| bibliophile | person who loves or collects books |
| bibliophobia | hatred, fear, or mistrust of books |
| claustrophobia | dread of being in closed or narrow spaces |
| dipsomaniac | person with an uncontrollable craving for alcoholic beverages |
| hemophilia | a tendency to bleed excessively from minor injuries; bleeder |
| kleptomaniac | one who has a persistent neurotic impulse to steal though not in need |
| mania | exaggerated enthusiasm; craze; mad impulse |
| megalomania | mental disorder characterized by fantasies of grandeur, power, wealth |
| monomania | derangement of the mind on one subject only |
| phobia | abnormal and persistent fear, dislike, or hatred |
| photophilic | light-loving; requiring abundant light |
| photophobia | painful sensitivity to light |
| pyromania | an insane impulse to start fires |
| xenophobia | unreasonable fear or hatred of foreigners or stangers |