Synonyms for Plain:
artless, blunt, broad, callow, candid, direct, downright, frank, genuine, honest, ingenuous, naive, natural, open, outgoing, overt, sincere, straightforward, trusting, unadorned, unaffected, undisguised, unrestrained, unsophisticated, Plain-spoken, Unartful, Unbeguiling, un-artificial, uncalculating, undeceitful, undeceiving, undeceptive.
•clear, obvious (adjective)
apparent, broad, comprehensible, definite, distinct, evident, legible, lucid, manifest, open, patent, understandable, visible.
abashed, apologetic, contrite, homely, humble, meek, mild, modest, plebeian, self-effacing, selfless, sheepish, submissive, unassuming, unobtrusive, unpretentious.
coherent, comprehensible, consistent, crisp, decipherable, intelligible, legible, lucid, perspicuous, self-explanatory, understandable, clear, direct, straightforward.
pure and simple, unmixed.
•normal, everyday (adjective)
average, common, commonplace, conventional, dull, homely, modest, ordinary, routine, simple, traditional, usual.
aboriginal, angelic, atomic, austere, bare, basal, basic, blameless, chaste, clean, clear, decent, elemental, elementary, essential, faultless, formative, fundamental, guiltless, honorable, immaculate, indivisible, innocent, irreducible, monolithic, nascent, primal, primary, prime, pure, purebred, simple, sinless, spotless, stainless, stark, unadorned, unadulterated, unalloyed, unblemished, uncluttered, undefiled, undiluted, unsullied, untainted, untarnished, virtuous, white, Simon-pure, foundational, unmingled.
bald, childlike, crystalline, refined, spare, terse, uncomplicated, artless, austere, bare, candid, chaste, clear, direct, elementary, innocent, pure, simple, unadulterated, undecorated, unelaborate, unostentatious, unsophisticated.
•straightforward in speech (adjective)
abrupt, artless, blunt, candid, direct, frank, honest, impolite, ingenuous, outspoken, rude, sincere.
banal, bland, flat, flavorless, insipid, jejune, milquetoast, savorless, stale, tasteless, unsavory, vapid, weak, mild.
abhorrent, disagreeable, disfigured, displeasing, grotesque, hideous, inelegant, odious, repellent, repugnant, repulsive, shapeless, ugly, unaesthetic, unappealing, unattractive, undesirable, unlovely, unpleasant, unpleasing, unsightly, Ill-looking, homely.
•unembellished, basic (adjective)
austere, bare, clean, dry, pure, severe, spartan, stark, unvarnished.
apparent, conspicuous, discernible, distinct, evident, exposed, manifest, observable, obvious, perceivable, perceptible, salient, seeable, visible, clear.
n.after, assignment, by, initial, junior, nameless, namesake, nee, Of, naming ceremony. abrupt, excruciating, hopelessly, impolite, outspoken, rude, sadly, sorry, unspeakable, utterly, such as it is. clear-cut, crystal clear, identifiable, noticeable, pronounced, see, show up. irreproachable, principled, truthful, unsubtle, upstanding. buttery, calorific, chewy, chilled, cool, cream, crispy, unostentatious, caramelized. grim, monstrous. perfect, subcontinent, swath, swathe, sweep, land mass, the mainland. full-strength, neat, straight, strong, unblended. average, common, commonplace, cut-and-dried, formulaic, garden, good, indifferent, mediocre, ordinary, routine, run-of-the-mill, standard, stock, undistinguished, unexceptional, unremarkable, usual, garden-variety. beautiful, uncomely. all-out, arrant, big, blooming, complete, consummate, crashing, damned, dead, flat out, limited, outright, positive, thorough, thoroughgoing, total, unbounded, unlimited, unmitigated, unqualified, unrelieved, unreserved, utter. •level land (noun)
champaign, field, flat, heath, moor, plateau, prairie, steppe, tundra.
average, common, commonplace, conventional, dull, everyday, traditional.
apparent, apparently, austere, bare, champaign, chaste, complain, direct, dry, evident, evidently, featureless, field, general, homely, inelaborate, kick, knit, knit stitch, kvetch, literal, manifest, manifestly, mere, obvious, obviously, patent, patently, plain stitch, plainly, popular, pure, pure and simple, quetch, self-colored, self-coloured, severe, sheer, simple, solid, sound off, stark, tailored, trim, unadorned, unattractive, undecorated, unelaborate, unembellished, unmingled, unmixed, unornamented, unpatterned, unvarnished.
champaign, countryside, desert, flatness, heath, mesa, moor, pampas, plateau, prairie, savanna, steppe, tundra, veld.
arrant, conventional, crashing, crystal clear, cut-and-dried, formulaic, full-strength, identifiable, show up, subcontinent, unblended, uncomely, unexceptional, unostentatious, unrelieved, unremarkable, unsubtle, garden-variety, land mass, the mainland. beautiful, definite, dull, garden, mediocre, monstrous, noticeable, outright, pronounced, run-of-the-mill, swath, swathe, thoroughgoing. all-out, commonplace, consummate, flat out, unbounded, unlimited, unmitigated. blooming, ordinary, thorough. average, damned, neat, unqualified. grim, indifferent. positive, unreserved. complete, dead, perfect. strong. •commonplace
functional, spartan, undecorated.
•Other relevant words:
common, commonplace, dead, definite, everyday, mere, neat, ordinary, patent, severe, sheer, stock, unembellished, unvarnished.