cockatoo parrot vs cockatiel

cockatoo parrot and cockatiel both are nouns.

Word	Noun	Adjective	Verb	Adverb
cockatoo parrot	Yes	No	No	No
cockatiel	Yes	No	No	No

As nouns, cockatoo parrot and cockatiel are synonyms defined as:

cockatoo parrot and cockatiel: small grey Australian parrot with a yellow crested head

Other synonyms of cockatoo parrot include cockateel, Nymphicus hollandicus.

cockatoo parrot (noun)	cockatiel (noun)
small grey Australian parrot with a yellow crested head	small grey Australian parrot with a yellow crested head