macaroni vs fashion plate

macaroni and fashion plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
macaroni	Yes	No	No	No
fashion plate	Yes	No	No	No

As nouns, fashion plate is a hypernym of macaroni; that is, fashion plate is a word with a broader meaning than macaroni:

macaroni: a British dandy in the 18th century who affected Continental mannerisms
fashion plate: a man who is much concerned with his dress and appearance

Other hypernyms of macaroni include beau, clotheshorse, dandy, dude, fop, gallant, sheik, swell.

macaroni (noun)	fashion plate (noun)
pasta in the form of slender tubes	a plate illustrating the latest fashion in dress
a British dandy in the 18th century who affected Continental mannerisms	a man who is much concerned with his dress and appearance