tropicbird vs tropic bird

tropicbird and tropic bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
tropicbird	Yes	No	No	No
tropic bird	Yes	No	No	No

As nouns, tropicbird and tropic bird are synonyms defined as:

tropicbird and tropic bird: mostly white web-footed tropical seabird often found far from land

Other synonyms of tropicbird include boatswain bird.

tropicbird (noun)	tropic bird (noun)
mostly white web-footed tropical seabird often found far from land	mostly white web-footed tropical seabird often found far from land