McGuffin vs celluloid

McGuffin and celluloid both are nouns.

Word	Noun	Adjective	Verb	Adverb
McGuffin	Yes	No	No	No
celluloid	Yes	Yes	No	No

McGuffin (noun)	celluloid (noun)
(film) a plot element that catches the viewers' attention or drives the plot	a medium that disseminates moving pictures
	highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics

McGuffin (adjective)	celluloid (adjective)
	artificial as if portrayed in a film