1) Abet 2) Begin 3) Cause 4) Create 5) Foment 6) Motivate 7) Open 8) Seton 9) Spur 10) Start 1) Be behind 2) Foment 3) Incite 4) Incite, urge 5) Provoke 6) Provoke or stir up 7) Set off 8) Spur on to some action 9) Stimulate 10) Stir up 11) To cause by incitement 12) To incite 13) To provoke 14) Urge on to some action 
• (v. t.) To goad or urge forward; to set on; to provoke; to incite; -- used chiefly with reference to evil actions; as to instigate one to a crime.
In'sti·gate transitive verb [ imperfect & past participle Instigated ; present participle & verbal noun Instigating .] [ Latin instigatus , past participle of instigare to instigate; prefix in- in + a root akin to G...
instigate 1. To urge on; to goad. 2. To stir up; to foment.
to cause by incitement; foment: to instigate a quarrel. · to urge, provoke, or incite to some action or course: to instigate the people to revolt.
provoke or stir up