red grouse vs moorfowl

red grouse and moorfowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
red grouse	Yes	No	No	No
moorfowl	Yes	No	No	No

As nouns, red grouse and moorfowl are synonyms defined as:

red grouse and moorfowl: reddish-brown grouse of upland moors of Great Britain

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

red grouse (noun)	moorfowl (noun)
reddish-brown grouse of upland moors of Great Britain	reddish-brown grouse of upland moors of Great Britain