hazardous (adj.)

• adventurous
• aleatory
• chancy
• dangerous
• desultory
• dicey
• dickey
• hairy
• infirm
• insecure
• insubstantial
• parlous
• perilous
• precarious
• provisional
• questionable
• risky
• shaky
• shifting
• shifty
• slippery
• speculative
• temporary
• tentative
• ticklish
• treacherous
• tricky
• uncertain
• undependable
• unhealthy
• unpredictable
• unreliable
• unsafe
• unsound
• unstable
• unsteady
• unsubstantial
• unsure
• untrustworthy
• venturesome
• venturous
• wicked
• wildcat