WordNet sense 1 (dense vegetation consisting of stunted trees or bushes):

bush, chaparral

WordNet sense 2 (postpone indefinitely or annul something that was scheduled):

cancel, scratch, call off

WordNet sense 3 (not made more desirable or valuable or profitable; especially not made ready for use or marketing):

unimproved

WordNet sense 4 (clean with hard rubbing):

scour

WordNet sense 5 (the act of cleaning a surface by rubbing it with a brush and soap and water):

scrubbing, scouring

WordNet sense 6 (wash thoroughly):

scrub up