booster rocket booster pump • booster shot · · · Info · Definitions · Synonyms · Characters · · booster rocket · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) the first stage of a multistage rocket. Synonyms: booster, booster rocket, booster unit, takeoff booster, takeoff rocket. · · Noun Definition 1 Synonyms · · · booster · · Synonym 1 booster unit · · Synonym 2 takeoff booster · · Synonym 3 takeoff rocket · · Synonym 4 Characters · · space U+0020 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 k latin small letter k U+006B o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074