[1] : WordNet (r) 2.0

brush up
     v 1: refresh one's memory; "i reviewed the material before the
          test" syn: review, refresh
     2: bring to a highly developed, finished, or refined state;
        "polish your social manners" syn: polish, round, round
        off, polish up
see also:
review refresh polish round round off polish up 

[2] : Moby Thesaurus II by Grady Ward, 1.0

36 moby thesaurus words for "brush up":
   bone up, brighten up, cram, cram up, dress, fettle, fix, freshen,
   furbish, furbish up, get up, get up on, groom, manicure, plume,
   polish, polish up, preen, read up on, refresh the memory, renovate,
   repair, restudy, retouch, review, revive, rub up, shine, spruce,
   spruce up, study up, study up on, tone up, touch up, vamp,
   vamp up

Ball Up >> B Words
Ball Up, definition of term: Ball Up
ball+up_pag1.html

Bang Up >> B Words
Bang Up, definition of term: Bang Up
bang+up_pag1.html

Backed Up >> B Words
Backed Up, definition of term: Backed Up
backed+up_pag1.html

Back Up >> B Words
Back Up, definition of term: Back Up
back+up_pag1.html

Ante Up >> A Words
Ante Up, definition of term: Ante Up
ante+up_pag1.html

Act Up >> A Words
Act Up, definition of term: Act Up
act+up_pag1.html