quarrel vs spat

quarrel and spat both are nouns.

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

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

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

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

Other hyponyms of quarrel include brawl, wrangle, polemicise, polemicize, polemise, polemize, fall out.

quarrel (noun)	spat (noun)
an arrow that is shot from a crossbow; has a head with four edges	a young oyster or other bivalve
an angry dispute	a cloth covering (a legging) that covers the instep and ankles
	a quarrel about petty points

quarrel (verb)	spat (verb)
have a disagreement over something	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