panty vs pantie

panty and pantie both are nouns.

Word	Noun	Adjective	Verb	Adverb
panty	Yes	No	No	No
pantie	Yes	No	No	No

As nouns, panty and pantie are synonyms defined as:

Other synonyms of panty include scanty, step-in.

panty (noun)	pantie (noun)
short underpants for women or children	short underpants for women or children