grumble, v. [murmur], [repine], [complain], [croak]; [growl], [snarl].
grumbler, n. complainer, [croaker], [fault-finder], [growler].
grumpy, a. (Colloq.) [surly], [disgruntled], [grouty], [irritable], [sullen].
guarantee, n. [warranty], [security], [surety].
guard, v. [protect], [defend], [shield], [shelter], fortify, [preserve]. Antonym: [expose].
guard, n. guardsman, [watch], [watchman], [sentinel], patrol, sentry, [picket]; [convoy], [escort], body-guard; [defense], [protection], [shield], [safeguard], [bulwark], [armor]; [attention], [heed], [watch], circumspection. Associated word: cordon.
guarded, a. [cautious], [wary], circumspect, [careful], [reserved], non-committal.
guardian, n. [defender], [guard], tutelary [saint], [keeper], [warden], [protector], [defense], guardian [angel]. Antonyms: [ward], protégé.
guardian, a. tutelary, protecting, tutelar.
guardianship, n. [protection], [care], [watch], wardenship, tutelage.