beef, bellyache, bleat, carp, caterwaul, complain, crab, croak, fuss, gripe, grizzle, grouch, grouse, growl, grumble, grump, holler, inveigh, keen, kick, kvetch, maunder [chiefly British], moan, murmur, mutter, nag, repine, scream, squawk, squeal, wail, whimper, whine, whinge [British], yammer, yawp (or yaup), yowl