moor-bird vs moorbird

moor-bird and moorbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
moor-bird	Yes	No	No	No
moorbird	Yes	No	No	No

As nouns, moor-bird and moorbird are synonyms defined as:

moor-bird and moorbird: reddish-brown grouse of upland moors of Great Britain

Other synonyms of moor-bird include Lagopus scoticus, moorfowl, moorgame, red grouse.

moor-bird (noun)	moorbird (noun)
reddish-brown grouse of upland moors of Great Britain	reddish-brown grouse of upland moors of Great Britain