dustup vs spat

dustup and spat both are nouns.

Word	Noun	Adjective	Verb	Adverb
dustup	Yes	No	No	No
spat	Yes	No	Yes	No

As nouns, spat is a hyponym of dustup; that is, spat is a word with a more specific, narrower meaning than dustup:

Other hyponyms of dustup include affray, altercation, fracas, bicker, bickering, fuss, pettifoggery, squabble, tiff, bust-up.

dustup (noun)	spat (noun)
an angry dispute	a young oyster or other bivalve
	a cloth covering (a legging) that covers the instep and ankles
	a quarrel about petty points

dustup (verb)	spat (verb)
	clap one's hands together
	spawn
	engage in a brief and petty quarrel
	clap one's hands or shout after performances to indicate approval
	strike with a sound like that of falling rain
	become permanently attached
	come down like raindrops