24 synonyms for risky such as defenceless, chancy, and dangerous. Risky is an adjective, and its antonyms are safe and cautious.
Chancy, dangerous, defenceless, dicey, dodgy, exposed, fraught with danger, gnarly, hairy, hazardous, high-risk, insecure, parlous, perilous, precarious, speculative, sticky, touch-and-go, treacherous, tricky, uncertain, unpredictable, and unsafe.