Search Result for "nihilist": 
Wordnet 3.0

NOUN (2)

1. someone who rejects all theories of morality or religious belief;

2. an advocate of anarchism;
[syn: anarchist, nihilist, syndicalist]

The Collaborative International Dictionary of English v.0.48:

Nihilist \Ni"hil*ist\, n. [Cf. F. nihiliste. See Nihilism.] 1. One who advocates the doctrine of nihilism; one who believes or teaches that nothing can be known, or asserted to exist. [1913 Webster] 2. (Politics) A member of a secret association (esp. in Russia), which is devoted to the destruction of the present political, religious, and social institutions. [1913 Webster]
WordNet (r) 3.0 (2006):

nihilist n 1: someone who rejects all theories of morality or religious belief 2: an advocate of anarchism [syn: anarchist, nihilist, syndicalist]
Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "nihilist": Bolshevik, Cassandra, Eeyore, Jacobin, Wobbly, anarch, anarchist, anarcho-syndicalist, animal, annihilator, anthropophagite, antinomian, arsonist, barbarian, beast, biblioclast, bomber, brute, burner, calamity howler, cannibal, cynic, defeatist, demolisher, destroyer, dynamitard, dynamiter, exterminator, extreme left-winger, extremist, hun, hyena, iconoclast, idol breaker, idoloclast, killjoy, left-wing extremist, lunatic fringe, malist, man-eater, mild radical, mutineer, negativist, parlor Bolshevik, parlor pink, pessimist, pink, pinko, prophet of doom, radical, rebel, red, retreatist, revolutionary, revolutionist, ruiner, sans-culotte, savage, seek-sorrow, shark, subversive, syndicalist, terrorist, tiger, ultra, ultraist, vandal, wild man, worrywart, wrecker, yippie
The Devil's Dictionary (1881-1906):

NIHILIST, n. A Russian who denies the existence of anything but Tolstoi. The leader of the school is Tolstoi.