come down vs spat

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

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

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

Other hyponyms of come down include rain, rain down, snow, hail, sleet.

come down (noun)	spat (noun)
	a young oyster or other bivalve
	a cloth covering (a legging) that covers the instep and ankles
	a quarrel about petty points

come down (verb)	spat (verb)
get sick	clap one's hands together
be the essential element	spawn
criticize or reprimand harshly	engage in a brief and petty quarrel
move downward and lower, but not necessarily all the way	clap one's hands or shout after performances to indicate approval
fall from clouds	strike with a sound like that of falling rain
	become permanently attached
	come down like raindrops