adj. 25B6; adjective
a bumpy road : UNEVEN, rough, rutted, pitted, potholed, holey; lumpy, rocky.
a bumpy ride : BOUNCY, rough, uncomfortable, jolting, lurching, jerky, jarring, bone-shaking.
a bumpy start : INCONSISTENT, variable, irregular, fluctuating, intermittent, erratic, patchy; rocky, unsettled, unstable, turbulent, chaotic, full of ups and downs.
smooth.