• accident, accidental, casual, chance, coincidence, contingent, fortuitous, hap, haphazard, happenstance, hazard, luck, occasion, occasional, promiscuous, random, stray
• grim, harsh, hell-bent, to play hardball, uncharitable, unmindful
• cracked, defective, imperfect, incomplete, to be cracked, woody
• accidentally, at a venture, at random, by any chance, by chance, by coincidence, by luck, by misadventure, eventually, fortuitously, haphazard, haphazardly, happily, inadvertently, perchance