| A | B |
|---|
| Caldarium | Hot-water room in a Roman Bath |
| Tepidarium | Warm-water room in a Roman Bath |
| Frigidarium | cold-water room in a Roman Bath |
| Pilum | A light Roman throwing spear |
| Scutum | A Roman shield |
| Gladius | A Spanish short sword adopted by the Romans |
| Arch | The basic component in architecture |
| Keystone | locks the two sides of an arch together |
| Aquaduct | Brings fresh water to a city from mountain streams |
| Innovation | Improving an older idea or invention |
| Legion | A large Roman military formation |
| Phalanx Legion | A long but thin line of Roman soldiers 4 men deep and 500 men wide |
| Manipular Legion | Roman military formation 300-100 BCE; 4200 men in squares |
| eques | A mounted Roman soldier |
| pedes | A Roman soldier who fights on foot |
| Centurion | A Roman military commander of 100 men |
| Optio | This man was the rank below a centurion |
| Concrete | A mixture of sand, stone and cement |
| Public Fountain | The source of city drinking water |
| Cohortal Legion | Roman military formation of 6000 heavily armed soldiers; CA. 100 BCE-thru Imperial Roman period |
| Forum | Center of a Roman city; courts, shops and services were offered here |
| Blocks | How Roman streets were designed |
| Decimation | A serious Roman military punishment; every 10th man was killed |
| Donatio | The Roman soldier's pay |
