jackhammer jackfruit tree • jack head · · · Info · Definitions · Synonyms · Characters · · jackhammer · · Text Latin · · Script 10 · · Length 3 · · Syllables Definitions · · · (noun) a hammer driven by compressed air. Synonyms: air hammer, pneumatic hammer. · · Noun Definition 1 Synonyms · · · air hammer · · Synonym 1 pneumatic hammer · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 j latin small letter j U+006A k latin small letter k U+006B m latin small letter m U+006D r latin small letter r U+0072