Guess a word c.....st

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

My newest chapter, incl 100 samples, completed at this word which need another pattern.

所有跟帖： 

• Gosh, I still could not figure it out. -祤湫霖- ♀ (0 bytes) () 10/18/2012 postreply 17:49:52

• 回複：Catalyst -bmdn- ♀ (0 bytes) () 10/18/2012 postreply 19:27:25

• Catalyst -走馬讀人- ♂ (57 bytes) () 10/18/2012 postreply 19:35:47

• communist! haha j/k -doyouknowme- ♀ (0 bytes) () 10/19/2012 postreply 08:05:21

• Confrontation of 2 communists become catalyst of Sino-US honey m -走馬讀人- ♂ (0 bytes) () 10/19/2012 postreply 09:17:09