budgerigar vs parroquet

budgerigar and parroquet both are nouns.

Word	Noun	Adjective	Verb	Adverb
budgerigar	Yes	No	No	No
parroquet	Yes	No	No	No

As nouns, parroquet is a hypernym of budgerigar; that is, parroquet is a word with a broader meaning than budgerigar:

budgerigar: small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors
parroquet: any of numerous small slender long-tailed parrots

Other hypernyms of budgerigar include parakeet, paraquet, paroquet, parrakeet, parroket.

budgerigar (noun)	parroquet (noun)
small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors	any of numerous small slender long-tailed parrots