| intoxication(noun, excitement, enthusiasm, motivation) |
| kicks(noun, excitement, enthusiasm, motivation) |
| melodrama(noun, excitement, enthusiasm, motivation) |
| motive(noun, excitement, enthusiasm, motivation) |
| movement(noun, excitement, enthusiasm, motivation) |
| nagging(adjective, challenge, motivation, ambition) |
| onerous(adjective, challenge, motivation, ambition) |
| oppressive(adjective, challenge, motivation, ambition) |
| perturbation(noun, excitement, enthusiasm, motivation) |
| pressing(adjective, challenge, motivation, ambition) |
| provocation(noun, excitement, enthusiasm, motivation) |
| querulous(adjective, challenge, motivation, ambition) |
| rage(noun, excitement, enthusiasm, motivation) |
| stimulation(noun, excitement, enthusiasm, motivation) |
| stimulus(noun, excitement, enthusiasm, motivation) |
| stir(noun, excitement, enthusiasm, motivation) |
| strict(adjective, challenge, motivation, ambition) |
| stringent(adjective, challenge, motivation, ambition) |
| taxing(adjective, challenge, motivation, ambition) |
| thrill(noun, excitement, enthusiasm, motivation) |