ball-peen hammer ball peen • ballpen · · · Info · Definitions · Characters · · ball-peen hammer · · Text Common · · Latin · · Scripts 16 · · Length 4 · · Syllables Definitions · · · (noun) a hammer with one round and one flat end; used in working metal. Synonyms: ball-peen hammer. · · Noun Definition 1 Characters · · space U+0020 - hyphen-minus U+002D a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072