run up pile up (debts or scores)
run-up a substantial increase over a relatively short period of time
runup a substantial increase over a relatively short period of time
run by pass by while running
roundup the activity of gathering livestock together so that they can be counted or branded or sold
rainbow an arc of colored light in the sky caused by refraction of the sun's rays by rain
round up seek out and bring together
turn up bend or lay so that one part covers the other
ring up to perform and record a sale on a cash register
burn up burn completely; be consumed or destroyed by fire
rub up a review that refreshes your memory
sunup the first light of day
runner-up the competitor who finishes second
turnup the lap consisting of a turned-back hem encircling the end of the sleeve or leg
burnup the amount of fuel used up (as in a nuclear reactor)
runabout an open automobile having a front seat and a rumble seat
churn up cause aversion in; offend the moral sense of
run out use up all one's strength and energy and stop working
tune up adjust for better functioning
tune-up adjustments made to an engine to improve its performance