brain trust brain-tire • brain truster · · · Info · Definitions · Synonyms · Characters · · brain trust · · Text Common · · Latin · · Scripts 11 · · Length Definitions · · · (noun) an inner circle of unofficial advisors to the head of a government. Synonyms: kitchen cabinet. · · Noun Definition 1 Synonyms · · · brain · · Synonym 1 encephalon · · Synonym 2 brainpower · · Synonym 3 learning ability · · Synonym 4 mental capacity · · Synonym 5 mentality · · Synonym 6 wit · · Synonym 7 mind · · Synonym 8 head · · Synonym 9 psyche · · Synonym 10 nous · · Synonym 11 genius · · Synonym 12 mastermind · · Synonym 13 brainiac · · Synonym 14 einstein · · Synonym 15 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 n latin small letter n U+006E 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