black-necked stork vs policeman bird

black-necked stork and policeman bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
black-necked stork	Yes	No	No	No
policeman bird	Yes	No	No	No

As nouns, black-necked stork and policeman bird are synonyms defined as:

black-necked stork and policeman bird: large mostly white Australian stork

Other synonyms of black-necked stork include jabiru, Xenorhyncus asiaticus.

black-necked stork (noun)	policeman bird (noun)
large mostly white Australian stork	large mostly white Australian stork