bolster up bolster plate • bolsterer · · · Info · Definitions · Synonyms · Characters · · bolster up · · Text Common · · Latin · · Scripts 10 · · Length 3 · · Syllables Definitions · · · (verb) support and strengthen. Synonyms: bolster, bolster up. Example: "Bolster morale." · · Verb Definition 1 Synonyms · · · bolster · · Synonym 1 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075