Synonyms for Activate:

n.

flick, control, engage, eject, coax, flash. action. activate (noun)
set off, touch off, aerate, trigger, trip, actuate, trigger off, spark off, spark.
stimulate (noun)
arouse, begin, initiate.

v.

creation (verb)
set off, spark, trigger, spark off, actuate, touch off, trigger off, trip.
energize (verb)
spark, force, drive, rouse, charge, fire, invigorate, recharge, empower, power, revive, energize.
initiate something; start a function (verb)
trigger, energize, actuate, arouse, rouse.
invigorate (verb)
strengthen, animate, enthuse, enliven, agitate, excite.

Other synonyms:

coax, begin, flick, eject. engage, control. flash. begin
initiate.
set-off
set off.