moorbird vs moor-bird

moorbird and moor-bird both are nouns.

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

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

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

Other synonyms of moorbird include Lagopus scoticus, moorfowl, moorgame, red grouse.

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