In archaic|lang=en terms the difference between trigger and explode
is that
trigger is (archaic) a catch to hold the wheel of a carriage on a declivity while
explode is (archaic) to disprove or debunk.
In lang=en terms the difference between trigger and explode
is that
trigger is to spark a response, especially a negative emotional response, in (someone) while
explode is to blast, to blow up, to burst, to detonate, to go off.
As verbs the difference between trigger and explode
is that
trigger is to fire a weapon while
explode is to destroy with an explosion.
As a noun trigger
is a finger-operated lever used to fire a gun.