spark vs pass off

spark is a noun but pass off is not a noun.

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

spark (noun)	pass off (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

spark (verb)	pass off (verb)
put in motion or move to act	expel (gases or odors)
emit or produce sparks	come to pass
	disappear gradually
	disregard
	cause to be circulated and accepted in a false character or identity
	be accepted as something or somebody in a false character or identity