activate vs touch off

activate and touch off both are verbs.

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

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

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

activate (verb)	touch off (verb)
make active or more active	put in motion or move to act
make (substances) radioactive
aerate (sewage) so as to favor the growth of organisms that decompose organic matter
make more adsorptive
put in motion or move to act