| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | lying flat |
| Synonyms: | accumbent, aligned, even, flush, level, parallel, plane, recumbent, regular, smooth, straight, uniform |
| Antonyms: | upright, vertical |
| Main Entry: | even |
| Part of Speech: | adjective |
| Definition: | flat, uniform |
| Synonyms: | alike, balanced, consistent, constant, continual, continuous, direct, equal, flush, homogenous, horizontal, level, matching, metrical, parallel, planate, plane, plumb, proportional, regular, right, same, smooth, square, stabile, stable, steady, straight, surfaced, true, unbroken, unchanging, undeviating, unfluctuating, uninterrupted, unvaried, unvarying, unwavering, unwrinkled |
| Antonyms: | broken, different, disparate, irregular, rough, uneven |
| Main Entry: | flat |
| Part of Speech: | adjective |
| Definition: | level, smooth |
| Synonyms: | collapsed, complanate, decumbent, deflated, depressed, empty, even, extended, fallen, flush, horizontal, laid low, low, oblate, outstretched, pancake, planar, planate, plane, procumbent, prone, prostrate, punctured, reclining, recumbent, splay, spread out, supine, tabular, unbroken |
| Antonyms: | broken, elevated, raised, rough, rounded, rugged, uneven |
| Main Entry: | flush |
| Part of Speech: | adjective |
| Definition: | flat |
| Synonyms: | even, horizontal, level, planate, plane, smooth, square, true |
| Antonyms: | rough, uneven |
| Main Entry: | level |
| Part of Speech: | adjective |
| Definition: | smooth, balanced |
| Synonyms: | akin, aligned, alike, calm, commensurate, common, comparable, consistent, constant, continuous, equable, equivalent, even, exact, flat, flush, horizontal, identical, in line, leveled, like, lined up, matched, matching, of same height, on a line, on a par, on one plane, parallel, plain, planate, plane, planed, polished, precise, proportionate, regular, rolled, same, stable, steady, straight, trim, trimmed, unbroken, unfluctuating, uniform, uninterrupted |
| Antonyms: | ragged, uneven |
| Main Entry: | perpendicular |
| Part of Speech: | adjective |
| Definition: | at right angles to |
| Synonyms: | erect, horizontal, on end, plumb, sheer, stand-up, standing, steep, straight, straight-up, upright, vertical |
| Antonyms: | horizontal, level |
| Main Entry: | prone |
| Part of Speech: | adjective |
| Definition: | lying down |
| Synonyms: | decumbent, face down, flat, horizontal, level, procumbent, prostrate, reclining, recumbent, resupine, supine |
| Notes: | apt is for general probabilities, likely is for specific probabilities; liable and prone indicate a probability arising as a regrettable consequence prone is lying on your face (facing downwards) - which is also true for prostrate, but only in expressing adoration or begging for protection; supine is lying on your back supine is lying face upward, prone and prostrate are lying face downward - and prostrate suggests throwing oneself down, while recumbent is lying flat in any position |
| Antonyms: | sitting, straight, upright |
| Main Entry: | recumbent |
| Part of Speech: | adjective |
| Definition: | lying down |
| Synonyms: | decumbent, flat, horizontal, level, procumbent, prostrate, reclining, resupine, sprawling, supine |
| Notes: | supine is lying face upward, prone and prostrate are lying face downward - and prostrate suggests throwing oneself down, while recumbent is lying flat in any position |
| Main Entry: | smooth |
| Part of Speech: | adjective |
| Definition: | level, unwrinkled; flowing |
| Synonyms: | bland, continuous, creamy, easy, effortless, equable, even, flat, fluent, fluid, flush, frictionless, gentle, glassy, glossy, hairless, horizontal, invariable, lustrous, mild, mirrorlike, monotonous, peaceful, plain, planate, plane, polished, quiet, regular, rhythmic, rippleless, serene, shaven, shiny, silky, sleek, soft, soothing, stable, steady, still, tranquil, unbroken, undeviating, undisturbed, uneventful, uniform, uninterrupted, unruffled, untroubled, unvarying, velvety |
| Antonyms: | broken, coarse, intermittent, irregular, rough, uneven, wrinkled |