| Subject | English | Portuguese |
| mech.eng. | all-weather spark plug | vela todo-o-tempo |
| mech.eng., el. | central spark plug electrode | elétrodo central |
| mech.eng., el. | cold spark plug | vela fria |
| mech.eng., el. | ground spark plug electrode | elétrodo de massa |
| mech.eng., el. | hot spark plug | vela quente |
| mech.eng., el. | one-pole spark plug | vela unipolar |
| mech.eng., el. | porcelain spark plug | vela com isolamento de porcelana |
| mech.eng., el. | single pole spark plug | vela unipolar |
| mech.eng., el. | sooted of spark plug | engorduramento das velas |
| transp. | spark plug | vela de ignição |
| mech.eng., el. | spark plug wire | fio de vela |
| mech.eng. | spark plug wrench | chave de vela |
| gen. | spark plugs | vela de ignição |
| mech.eng., el. | spark-plug nipple | porca de vela |
| patents. | spark-plugs | velas de ignição |
| mech.eng., el. | two-pole spark plug | vela bipolar |