Melopsittacus undulatus vs budgereegah

Melopsittacus undulatus and budgereegah both are nouns.

Word	Noun	Adjective	Verb	Adverb
Melopsittacus undulatus	Yes	No	No	No
budgereegah	Yes	No	No	No

As nouns, Melopsittacus undulatus and budgereegah are synonyms defined as:

Melopsittacus undulatus and budgereegah: small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors

Other synonyms of Melopsittacus undulatus include budgerigar, budgerygah, budgie, grass parakeet, lovebird, shell parakeet.

Melopsittacus undulatus (noun)	budgereegah (noun)
small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors	small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors