spark vs fall out

spark is a noun but fall out is not a noun.

Word	Noun	Adjective	Verb	Adverb
spark	Yes	No	Yes	No
fall out	No	No	Yes	No

spark (noun)	fall out (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)	fall out (verb)
put in motion or move to act	come to pass
emit or produce sparks	have a breach in relations
	drop out
	leave (a barracks) in order to take a place in a military formation, or leave a military formation
	come as a logical consequence; follow logically