parrot vs macaw

parrot and macaw both are nouns.

As nouns, macaw is a hyponym of parrot; that is, macaw is a word with a more specific, narrower meaning than parrot:

parrot: usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds
macaw: long-tailed brilliantly colored parrot of Central America and South America; among the largest and showiest of parrots

Other hyponyms of parrot include popinjay, poll, poll parrot, Psittacus erithacus, African gray, African grey, amazon, Nestor notabilis, kea, cockatoo, Nymphicus hollandicus, cockateel, cockatiel, cockatoo parrot, lovebird, lory, parakeet, paraquet, paroquet, parrakeet, parroket, parroquet.

parrot (noun)	macaw (noun)
usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds	long-tailed brilliantly colored parrot of Central America and South America; among the largest and showiest of parrots
a copycat who does not understand the words or acts being imitated

parrot (verb)	macaw (verb)
repeat mindlessly