peplus vs peplum

peplus and peplum both are nouns.

Word	Noun	Adjective	Verb	Adverb
peplus	Yes	No	No	No
peplum	Yes	No	No	No

As nouns, peplus and peplum are synonyms defined as:

peplus and peplum: a garment worn by women in ancient Greece; cloth caught at the shoulders and draped in folds to the waist

Other synonyms of peplus include peplos.

peplus (noun)	peplum (noun)
a garment worn by women in ancient Greece; cloth caught at the shoulders and draped in folds to the waist	a flared ruffle attached to the waistline of a dress or jacket or blouse
	a garment worn by women in ancient Greece; cloth caught at the shoulders and draped in folds to the waist