nihilist nihilism • nihilistic · · · Info · Definitions · Synonyms · Characters · · nihilist · · Text Latin · · Script 8 · · Length Definitions · · · (noun) someone who rejects all theories of morality or religious belief. · · Noun Definition 1 (noun) an advocate of anarchism. Synonyms: anarchist, syndicalist. · · Noun Definition 2 Synonyms · · · anarchist · · Synonym 1 syndicalist · · Synonym 2 Characters · · h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074