scrap vs fall out

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

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

As verbs, fall out is a hyponym of scrap; that is, fall out is a word with a more specific, narrower meaning than scrap:

Other hyponyms of scrap include brawl, wrangle, spat, polemicise, polemicize, polemise, polemize.

scrap (noun)	fall out (noun)
the act of fighting; any contest or struggle
a small piece of something that is left over after the rest has been used
a small fragment of something broken off from the whole
worthless material that is to be disposed of

scrap (verb)	fall out (verb)
make into scrap or refuse	come to pass
have a disagreement over something	have a breach in relations
dispose of (something useless or old)	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