accidental, chance, coincidentalconvenient, opportune, seasonable, timelyunexpected, unforeseen, unlooked-forauspicious, bright, encouraging, fair, heartening, hopeful, promising, propitiousbenign, favorable, golden, good, halcyonadvantageous, beneficial, profitablefluky(also flukey), fortuitous, fortunate, happy, heaven-sent, lucky, providential

inconvenient, inopportune, unseasonable, untimelyanticipated, expected, foreseendeliberate, intentional, plannedinauspicious, unpromisingcalamitous, catastrophic, disastroushapless, ill-fated, ill-starred, luckless, star-crossed, unfortunate, unhappy, unlucky