come vs fall out

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

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

As verbs, fall out is a hypernym of come; that is, fall out is a word with a broader meaning than come:

Other hypernyms of come include come about, go on, hap, happen, occur, pass, pass off, take place.

come (noun)	fall out (noun)
the thick white fluid containing spermatozoa that is ejaculated by the male genital tract

come (verb)	fall out (verb)
come to pass; arrive, as in due course	come to pass
be found or available	have a breach in relations
reach or enter a state, relation, condition, use, or position	drop out
happen as a result	leave (a barracks) in order to take a place in a military formation, or leave a military formation
have a certain priority	come as a logical consequence; follow logically
come to one's mind; suggest itself
move toward, travel toward something or somebody or approach something or somebody
be received
cover a certain distance
reach a destination; arrive by movement or progress
experience orgasm
come under, be classified or included
proceed or get along
extend or reach
to be the product or result
exist or occur in a certain point in a series
be a native of
to measure up to in kind or quality
add up in number or quantity
come forth
come from; be connected by a relationship of blood, for example