売却【ばいきゃく】
selling off, disposal by sale, sale
棄却【ききゃく】
rejection, dismissal, turning down, abandoning, renunciation
返却【へんきゃく】
return of something, repayment
却下【きゃっか】
rejection, dismissal
忘却【ぼうきゃく】
lapse of memory, forgetting completely, (consigning to) oblivion
退却【たいきゃく】
retreat, withdrawal, retirement