Synonyms and related words :
accordant, alike, austere, automatic, balanced, bare, basic, characterless, chaste, colossal, consistent, consonant, constant, continuous, correspondent, craggy, crystal, crystalline, elementary, enormous, equable, equal, essential, even, featureless, flat, fundamental, giant, gigantic, gravelly, gritty, homely, homespun, homogeneous, huge, immovable, immutable, impenetrable, imposing, indivisible, inflexible, intractable, invariable, invulnerable, irreducible, lapideous, level, lithoid, lithoidal, massive, measured, mechanical, mere, methodic, monumental, of a piece, ordered, orderly, pebbled, pebbly, persistent, plain, porphyritic, primal, primary, pure, pure and simple, regular, rigid, robotlike, rock-ribbed, rock-strewn, rock-studded, rocklike, rocky, sandy, severe, shingled, shingly, simon-pure, simple, single, smooth, solid, spare, stable, stark, steadfast, steady, stolid, stonelike, stony, systematic, trachytic, unadorned, unbending, unbroken, unchangeable, unchanged, unchanging, uncluttered, undeviating, undifferenced, undifferentiated, undiversified, uniform, unruffled, unvaried, unvarying