Accolade refers to a mark of acknowledgment, praise, or an award given to someone for their achievements. 'Praise' is the correct synonym as it directly expresses approval or admiration. 'Plentiful' means abundant, 'Charm' means attractiveness or the power to delight, and 'Refuse' means to decline - none of these match the meaning of accolade. The word comes from the French for 'embrace'.