Adjective : a hazardous journey.    From Dictionary.com. 

We halted, and he breathlessly told us General Hampton had ordered us to stop on account of the hazardousness of the journey.    From Wordnik.com.  [The last flag of truce,] Reference

"The single most important feature of the Basel Convention is the commitment of member countries to a programme of action to limit and eliminate the production of hazardous wastes; to reduce the hazardousness of any waste by applying suitable technology; and to treat residual waste in the best practicable manner.    From Wordnik.com.  [ANC Daily News Briefing] Reference

Plus biological hazardousness.    From Wordnik.com.  [between the rock and the cold, cold sea -- Day] Reference