squabble vs bicker

squabble and bicker both are nouns.

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

As nouns, squabble and bicker are synonyms defined as:

Other synonyms of squabble include bickering, fuss, pettifoggery, spat, tiff.

As verbs, squabble and bicker are synonyms defined as:

Other synonyms of squabble include brabble, niggle, pettifog, quibble.

squabble (noun)	bicker (noun)
a quarrel about petty points	a quarrel about petty points

squabble (verb)	bicker (verb)
argue over petty things	argue over petty things