frilly vs frill

frilly is not a noun while frill is a noun.

Word	Noun	Adjective	Verb	Adverb
frilly	No	Yes	No	No
frill	Yes	No	No	No

frilly (noun)	frill (noun)
	a strip of pleated material used as a decoration or a trim
	ornamental objects of no great value
	an external body part consisting of feathers or hair about the neck of a bird or other animal
	(paleontology) a bony plate that curves upward behind the skull of many ceratopsian dinosaurs

frilly (adjective)	frill (adjective)
having decorative ruffles or frills