| A | B |
| Mrs. O'Leary | the woman who was said to have started the Chicago Fire |
| Irish | of or relating to Ireland , its people, or their language |
| drought | a long period with no rain |
| barn | a farm building that is used to store hay and grain, and to house cows and horses |
| lantern | a portable container used for holding and protecting light |
| fire | the flame, heat and light given off when wood, paper or another material burns |
| wooden | something that is made of wood |
| disaster | an event that causes much suffering or loss |
| Peg Leg Sullivan | the O'Leary's friend who first discovered the fire burning in the barn behind their house |
| October 8, 1871 | the date of the Great Chicago Fire |
| DeKoven Street | the street where the O'Leary's house was located |