pom-pom vs pompon

pom-pom and pompon both are nouns.

Word	Noun	Adjective	Verb	Adverb
pom-pom	Yes	No	No	No
pompon	Yes	No	No	No

As nouns, pom-pom and pompon are synonyms defined as:

pom-pom and pompon: decoration consisting of a ball of tufted wool or silk; usually worn on a hat

pom-pom (noun)	pompon (noun)
artillery designed to shoot upward at airplanes	dusky grey food fish found from Louisiana and Florida southward
decoration consisting of a ball of tufted wool or silk; usually worn on a hat	decoration consisting of a ball of tufted wool or silk; usually worn on a hat