spark off vs trigger off

spark off and trigger off both are verbs.

Word	Noun	Adjective	Verb	Adverb
spark off	No	No	Yes	No
trigger off	No	No	Yes	No

As verbs, spark off and trigger off are synonyms defined as:

Other synonyms of spark off include activate, actuate, set off, spark, touch off, trigger, trip.

spark off (verb)	trigger off (verb)
put in motion or move to act	put in motion or move to act