WordNet sense 1 (a preparation used in polishing):

polish

WordNet sense 2 (a highly developed state of perfection; having a flawless or impeccable quality):

cultivation, culture, finish, refinement

WordNet sense 3 (the property of being smooth and shiny):

burnish, gloss, glossiness

WordNet sense 4 (make (a surface) shine):

shine, smooth, smoothen

WordNet sense 5 (improve or perfect by pruning or polishing):

down, fine-tune, refine

WordNet sense 6 (bring to a highly developed, finished, or refined state):

round, brush up, round off, polish up