touch off vs trigger off

touch off and trigger off both are verbs.

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

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

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

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