boatbill vs boat-billed heron

boatbill and boat-billed heron both are nouns.

Word	Noun	Adjective	Verb	Adverb
boatbill	Yes	No	No	No
boat-billed heron	Yes	No	No	No

As nouns, boatbill and boat-billed heron are synonyms defined as:

boatbill and boat-billed heron: tropical American heron related to night herons

Other synonyms of boatbill include broadbill, Cochlearius cochlearius.

boatbill (noun)	boat-billed heron (noun)
tropical American heron related to night herons	tropical American heron related to night herons