spat vs bicker

spat and bicker both are nouns.

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

As nouns, spat and bicker are synonyms defined as:

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

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

spat (verb)	bicker (verb)
clap one's hands together	argue over petty things
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