chukka vs chukker

chukka and chukker both are nouns.

Word	Noun	Adjective	Verb	Adverb
chukka	Yes	No	No	No
chukker	Yes	No	No	No

As nouns, chukka and chukker are synonyms defined as:

chukka and chukker: (polo) one of six divisions into which a polo match is divided

chukka (noun)	chukker (noun)
a shoe that comes up to the ankle and is laced through two or three pairs of eyelets; often made of suede	(polo) one of six divisions into which a polo match is divided
(polo) one of six divisions into which a polo match is divided