Synonyms for SIMPLIFIED: simplistic, oversimplified, uncomplicated, simple, plain, homogeneous, uniform, noncomplex; Antonyms of SIMPLIFIED: complex, complicated, elaborate, convoluted, sophisticated, complicate, intricate, involved. Synonyms for SIMPLICITY: plainness, unity, uniformity, homogeneity, unsophistication, homogeneousness, clarity, perspicuity; Antonyms of SIMPLICITY: complexity, sophistication, intricacy, complication, elaborateness, complicatedness, complexness, complicacy. Synonyms of simplistic : excessively simple or simplified : treating a problem or subject with false simplicity by omitting or ignoring complicating factors or details adequate, if occasionally simplistic , historical background — Harlow Robinson.