| excitation(noun, emotion, reaction, feedback) |
| excitement(noun, emotion, reaction, feedback) |
| exhilaration(noun, emotion, reaction, feedback) |
| factor(noun, reason, fact, circumstance) |
| ferment(noun, emotion, reaction, feedback) |
| fever(noun, emotion, reaction, feedback) |
| ground(noun, reason, fact, circumstance) |
| impulse(noun, emotion, reaction, feedback) |
| impulsion(noun, emotion, reaction, feedback) |
| incitation(noun, emotion, reaction, feedback) |
| principle(noun, reason, fact, circumstance) |
| root(noun, reason, fact, circumstance) |
| source(noun, reason, fact, circumstance) |
| stimulation(noun, emotion, reaction, feedback) |
| stirring(noun, emotion, reaction, feedback) |
| subject(noun, reason, fact, circumstance) |
| trigger(noun, reason, fact, circumstance) |
| fun(noun, feeling, condition, emotion) |
| enjoyment(noun, feeling, condition, emotion) |
| gladness(noun, feeling, condition, emotion) |