| service(noun, strength, vigor, heat, liveliness) |
| steam(noun, strength, vigor, heat, service) |
| strength(noun, vigor, heat, service, liveliness) |
| voltage(noun, strength, vigor, heat, service) |
| wattage(noun, strength, vigor, heat, service) |
| élan(vigor, liveliness, vitality, get-up-and-go, oomph) |
| activity(noun, vigor, liveliness, vitality, get-up-and-go) |
| animation(noun, vigor, liveliness, vitality, get-up-and-go) |
| ardor(noun, vigor, liveliness, vitality, get-up-and-go) |
| birr(noun, vigor, liveliness, vitality, get-up-and-go) |
| dash(noun, vigor, liveliness, vitality, get-up-and-go) |
| drive(noun, vigor, liveliness, vitality, get-up-and-go) |
| effectiveness(noun, vigor, liveliness, vitality, get-up-and-go) |
| efficacy(noun, vigor, liveliness, vitality, get-up-and-go) |
| efficiency(noun, vigor, liveliness, vitality, get-up-and-go) |
| endurance(noun, vigor, liveliness, vitality, get-up-and-go) |
| energy(noun, vigor, liveliness, vitality, get-up-and-go) |
| enterprise(noun, vigor, liveliness, vitality, get-up-and-go) |
| exertion(noun, vigor, liveliness, vitality, get-up-and-go) |
| fire(noun, vigor, liveliness, vitality, get-up-and-go) |