firebug firebrick • fireburn · · · Info · Definitions · Synonyms · Characters · · firebug · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a criminal who illegally sets fire to property. Synonyms: arsonist, incendiary. · · Noun Definition 1 (noun) a true bug: brightly colored bug that can exude a stain. · · Noun Definition 2 Synonyms · · · arsonist · · Synonym 1 incendiary · · Synonym 2 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 r latin small letter r U+0072 u latin small letter u U+0075