WordNet (r) 3.0 (2006):

dialectical materialism
    n 1: the materialistic philosophy of Karl Marx and Friedrich
         Engels

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "dialectical materialism":
   Bolshevism, Castroism, Communist Information Bureau,
   Communist Party, Maoism, Marxian socialism, Marxism,
   Marxism-Leninism, Stalinism, Titoism, Trotskyism, animalism,
   atomism, behaviorism, commonsense realism, communism,
   democratic centralism, earthliness, empiricism, epiphenomenalism,
   historical materialism, hylomorphism, hylotheism, hylozoism,
   iron curtain, materialism, mechanism, natural realism, naturalism,
   new realism, physicalism, physicism, positive philosophy,
   positivism, pragmaticism, pragmatism, realism,
   representative realism, revisionism, secularism, substantialism,
   temporality, worldliness