Synonyms of riskier

2 Syllables
touchy, hairy, chancy, tricky, iffy, wicked, rocky, ticklish, unsound, dicey
3 Syllables
hazardous, jeopardous, treacherous, touch-and-go, wide-open, unsafe, unhealthy, precarious, uncertain, perilous
4 Syllables
sensitive, delicate, endangered, insecure
5 Syllables
speculative, venturesome