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Synonyms for Risky (same or very similar meaning)

WordNet sense 1 (not financially safe or secure):
bad, speculative, high-risk

WordNet sense 2 (not sound financially):
unsound

WordNet sense 3 (involving risk or danger):
hazardous, wild

WordNet sense 4 (involving or causing danger or risk; liable to hurt or harm):
dangerous


From the ODE community, based on WordNetadd/edit