THESAURUS
plain english
austerity, baldness, bareness, candor, clarity, clear-cutness, clearness, coherence, common speech, connectedness, consistency, crystallinity, definition, directness, distinctness, explicitness, frankness, homespun, household words, leanness, limpidity, lucidity, matter-of-factness, naturalness, openness, pellucidity, perspicuity, plain speaking, plain speech, plain style, plain words, plainness, prosaicness, prosiness, restrainedness, rustic style, severity, simpleness, simplicity, soberness, spareness, starkness, straightforwardness, structure, transparency, transpicuity, unadorned style, unadornedness, unaffectedness, unambiguousness, unequivocalness, unimaginativeness, unmistakableness, unpoeticalness, vernacular
ROGET THESAURUS
plain english
Plainness
N
plainness, simplicity, severity, plain terms, plain English, Saxon English, household words, plain, simple, unornamented, unadorned, unvarnished, homely, homespun, neat, severe, chaste, pure, Saxon, commonplace, matter-of- fact, natural, prosaic, dry, unvaried, monotonous, in plain terms, in plain words, in plain English, in plain common parlance, point-blank.