smooth (adjective) smooth: level, unwrinkled; flowing
Sinonime: 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
Antonime: broken,
coarse,
intermittent,
irregular,
rough,
uneven, wrinkled