| Main Entry: | |
| Part of Speech: | noun |
| Definition: | something which incites activity |
| Synonyms: | adjuvant, agitator, enzyme, goad, impetus, impulse, incendiary, incentive, incitation, incitement, motivation, radical stimulus, reactant, reactionary, spark plug, spur, stimulant, synergist, wave maker |
| Antonyms: | block, blockage, preventer, prevention |
| Main Entry: | leavening |
| Part of Speech: | noun |
| Definition: | catalyst |
| Synonyms: | adjuvant, agitator, enzyme, ferment, goad, impetus, impulse, incendiary, incentive, incitation, incitement, leaven, motivation, radical stimulus, reactant, reactionary, spark plug, spur, stimulant, synergist, wave maker, yeast |