complainer complainant • complainingly · · · Info · Definitions · Synonyms · Characters · · complainer · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a person given to excessive complaints and crying and whining. Synonyms: whiner, moaner, sniveller, crybaby, bellyacher, grumbler, squawker. · · Noun Definition 1 Synonyms · · · whiner · · Synonym 1 moaner · · Synonym 2 sniveller · · Synonym 3 crybaby · · Synonym 4 bellyacher · · Synonym 5 grumbler · · Synonym 6 squawker · · Synonym 7 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072