tropic bird vs tropicbird

tropic bird and tropicbird both are nouns.

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

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

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

Other synonyms of tropic bird include boatswain bird.

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