The Collaborative International Dictionary of English v.0.48:

Communistic \Com`mu*nis"tic\, a.
   1. Of or pertaining to communism or communists; as,
      communistic theories.
      [1913 Webster]

   2. (Zool.) Living or having their nests in common, as certain
      birds.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

collectivized \col*lec"tiv*ized\ a.
   brought under collective ownership and operating under
   collectivist principles; -- used especially of organizations
   operating under the ownership by the state.

   Note: [Narrower terms: socialistic (vs. capitalistic),
         socialist; communistic]

   Syn: collective, collectivised, state-controlled.
        [WordNet 1.5 +PJC]

The Collaborative International Dictionary of English v.0.48:

Collectivist \Col*lect"iv*ist\, collectivistic
\col*lec`tiv*is"tic\a.
   1. Relating to, characteristic of, or advocating,
      collectivism.
      [1913 Webster]

   2. operating under collectivist principles.

   Note: [Narrower terms: socialistic (vs. capitalistic),
         socialist; communistic]

   Syn: collectivized, state-controlled.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

communistic
    adj 1: relating to or marked by communism; "Communist Party";
           "communist governments"; "communistic propaganda" [syn:
           communist, communistic]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "communistic":
   associated, coacting, coactive, coadjutant, coadjuvant,
   coefficient, collaborative, collective, collectivist,
   collectivistic, collusive, combined, commensal, common, communal,
   communalist, communalistic, communist, communitarian, commutual,
   concerted, concordant, concurrent, concurring, conjoint, conniving,
   cooperant, cooperating, cooperative, ecumenic, fellow, general,
   harmonious, harmonized, in common, joint, mutual, noncompetitive,
   popular, public, reciprocal, social, socialistic, societal,
   symbiotic, synergetic, synergic, synergistic, uncompetitive