actuate vs spark

actuate is not a noun while spark is a noun.

Word	Noun	Adjective	Verb	Adverb
actuate	No	No	Yes	No
spark	Yes	No	Yes	No

As verbs, actuate and spark are synonyms defined as:

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

actuate (noun)	spark (noun)
	merriment expressed by a brightness or gleam or animation of countenance
	a momentary flash of light
	a small fragment of a burning substance thrown out by burning material or by friction
	electrical conduction through a gas in an applied electric field
	a small but noticeable trace of some quality that might become stronger

actuate (verb)	spark (verb)
put in motion or move to act	put in motion or move to act
give an incentive for action	emit or produce sparks