gear case gear brusher • gear cutter · · · Info · Definitions · Synonyms · Characters · · gear case · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) the shell (metal casing) in which a train of gears is sealed. Synonyms: gearbox, gear box, gear case. · · Noun Definition 1 Synonyms · · · gearbox · · Synonym 1 gear box · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 r latin small letter r U+0072 s latin small letter s U+0073