quarrel vs squabble

quarrel and squabble both are nouns.

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

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

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

quarrel (noun)	squabble (noun)
an arrow that is shot from a crossbow; has a head with four edges	a quarrel about petty points
an angry dispute

quarrel (verb)	squabble (verb)
have a disagreement over something	argue over petty things