Nouns

(n)grouseflesh of any of various grouse of the family Tetraonidae; usually roasted; flesh too dry to broil
(n)grousepopular game bird having a plump body and feathered legs and feet

Verbs

(v)grousehunt grouse
(v)gripe, bitch, grouse, crab, beef, squawk, bellyache, hollercomplain“What was he hollering about?”