nihilismEnglishOxford American Thesaurusnihilism noun 1 he could not accept Bacon's nihilism, his insistence that man is a futile being: negativity, cynicism, pessimism; rejection, repudiation, renunciation, denial, abnegation; disbelief, nonbelief, unbelief, skepticism, lack of conviction, absence of moral values, agnosticism, atheism, nontheism. 2 the roots of this decline lay deep in the moral nihilism of the 1960s: anarchy, disorder, chaos, absence of government, lawlessness, mobocracy.