come down vs settle

come down is not a noun while settle is a noun.

Word	Noun	Adjective	Verb	Adverb
come down	No	No	Yes	No
settle	Yes	No	Yes	No

As verbs, settle is a hyponym of come down; that is, settle is a word with a more specific, narrower meaning than come down:

come down (noun)	settle (noun)
	a long wooden bench with a back

come down (verb)	settle (verb)
get sick	take up residence and become established
be the essential element	form a community
criticize or reprimand harshly	become settled or established and stable in one's residence or life style
move downward and lower, but not necessarily all the way	establish or develop as a residence
fall from clouds	make final; put the last touches on; put into final form
	become resolved, fixed, established, or quiet
	come as if by falling
	bring to an end; settle conclusively
	settle conclusively; come to terms
	end a legal dispute by arriving at a settlement
	come to terms
	accept despite lack of complete satisfaction
	get one's revenge for a wrong or an injury
	fix firmly
	arrange or fix in the desired order
	come to rest
	settle into a position, usually on a surface or ground
	cause to become clear by forming a sediment (of liquids)
	sink down or precipitate
	go under
	become clear by the sinking of particles
	dispose of; make a financial settlement