moorgame vs moor-bird

moorgame and moor-bird both are nouns.

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

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

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

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

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