catbird vs bowerbird

catbird and bowerbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
catbird	Yes	No	No	No
bowerbird	Yes	No	No	No

As nouns, catbird and bowerbird are synonyms defined as:

catbird and bowerbird: any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females

catbird (noun)	bowerbird (noun)
North American songbird whose call resembles a cat's mewing	any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females
any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females