cockateel vs Nymphicus hollandicus

cockateel and Nymphicus hollandicus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cockateel	Yes	No	No	No
Nymphicus hollandicus	Yes	No	No	No

As nouns, cockateel and Nymphicus hollandicus are synonyms defined as:

cockateel and Nymphicus hollandicus: small grey Australian parrot with a yellow crested head

Other synonyms of cockateel include cockatiel, cockatoo parrot.

cockateel (noun)	Nymphicus hollandicus (noun)
small grey Australian parrot with a yellow crested head	small grey Australian parrot with a yellow crested head