pompon vs pom-pom

pompon and pom-pom both are nouns.

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

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

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

pompon (noun)	pom-pom (noun)
dusky grey food fish found from Louisiana and Florida southward	artillery designed to shoot upward at airplanes
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