| A | B |
| Macro | Large |
| Philanthropy | giving to charity in order to increase the well-being of humanity |
| Macroscopic | large enough to be seen with the naked eye |
| Mania | Obsession |
| Maniac | a person who has excessive enthusiasm for something |
| Manic-depressive | a disease that is marked by periods of extreme happiness and extreme depression |
| Mortis | Death |
| Mortician | a person who directs funerals |
| Morbid | having an unusual interest in death or unpleasant events |
| Pater | Father |
| Paternal | fatherly; of or related to fatherhood |
| Paternity | the state of being a father |
| Philo | Love |
| Philosophy | the love of the persuit of wisdom |
| Macronomics | the branch of economics that studies the national economy |