Synonyms for Flush (same or very similar meaning)
WordNet sense 1 (the period of greatest prosperity or productivity):
bloom, blossom, efflorescence, flower, heyday, peak, prime
WordNet sense 2 (sudden brief sensation of heat (associated with menopause and some mental disorders)):
hot flash
WordNet sense 3 (a rosy color (especially in the cheeks) taken as a sign of good health):
blush, rosiness
WordNet sense 4 (the swift release of a store of affective force):
bang, boot, charge, kick, thrill, rush
WordNet sense 5 (a sudden rapid flow (as of water)):
gush, outpouring
WordNet sense 6 (having an abundant supply of money or possessions of value):
affluent, loaded, moneyed, wealthy
WordNet sense 7 (possessing material wealth):
rich
WordNet sense 8 (make level or straight):
level, even out
WordNet sense 9 (polish and make shiny):
buff, burnish, furbish
WordNet sense 10 (being level or straight or regular and without variation as e.g. in shape or texture; or being in the same plane or at the same height as something else (i.e. even with)):
even
WordNet sense 11 (rinse, clean, or empty with a liquid):
purge, scour
WordNet sense 12 (irrigate with water from a sluice):
sluice
WordNet sense 13 (turn red, as if in embarrassment or shame):
crimson, redden
From the ODE community, based on WordNet
add/edit