Definition of lucky :
1. Favored by luck; fortunate; meeting with good success or good fortune; - said of persons; as, a lucky adventurer.
2. Producing, or resulting in, good by chance, or unexpectedly; favorable; auspicious; fortunate; as, a lucky mistake; a lucky cast; a lucky hour.
roaring, (it's) all right for someone, gilt, well-disposed, there but for the grace of God (go I), flourishing, luck, halcyon, well-off, well-situated, thank God/goodness/heaven(s), thriving, aureate, luck is on someone's side, prosperous, happy, charmed, gilded, friendly, apotropaic, golden, fortunately, easy, serendipitous, fortune smiles on someone/something, hot, prospering, lucky (old) you/me etc., gold, beginner's luck, lottery, well-heeled, comfortable, well-fixed, encouraging, hopeful, heaven-sent, favourable, dumb luck, providential, palmy, magic, prospered, booming, fortune, well-to-do, third time's the/a charm
accidental (part of speech: adjective)
fortunate (part of speech: adjective)
chancy (part of speech: adjective)