| A | B |
| flammable | able to burn |
| humanity | human kind |
| ignition | the place where something starts |
| flame | the flickering part of a fire |
| precise | accurate, exact |
| precision | an exact or accurate state |
| meter | a measurement or measuring device |
| metric | describes a system used to measure |
| microscope | a tool use to look at tiny organisms |
| microscopic | describes something that is too tiny to see with the naked eye |
| grave | describes something that is serious |
| gravity | seriousness |
| grateful | thankful |
| gratitude | the state of being appreciative |
| revise | to change |
| revision | a change |
| athlete | someone who plays sports |
| athletic | describes someone or something that has to do with sports |
| humane | kind and compassionate |
| ignite | to start or begin something |