breakneck
chanceful
chancy
critical
desperate
dicey
dodgy
hazardous
insidious
mordacious
on the hook
parlous
perilous
precarious
risky
self-destructive
suicidal
touch and go
treacherous
unreliable
wild
adventurous
alarming
bad
chance
dangersome
delicate
desultory
explosive
fell
fraught with danger
grievous
hairy
haphazard
harmful
hit-or-miss
iffy
infirm
insecure
insubstantial
jeopardous
kittle
major
menacing
nasty
nice
periculous
provisional
random
reserved
rickety
riskful
serious
danger
dangerously
difficult
new
stupid
terrible
safe