How to say "hazard" in Japanese

• 危険きけんJLPT N4approx.Common
  noun, na-adjectiveThe default choice for 'hazard' in its ordinary sense of danger or risk of harm, covering unsafe conditions and situations. It is the common everyday word for danger.
  トムは危険きけんに直面ちょくめんして彼かれの勇気ゆうきを示しめした。↗

  Tom showed his courage in the face of danger.
• 冒険ぼうけんJLPT N3approx.Common
  noun, na-adjective, suru verb, intransitive verbReally means a venture or attempt unlikely to succeed, i.e. risk-taking or adventure; 'hazard' is only a secondary gloss. Seldom the word you want for hazards as dangers—choose 危険 instead.

Use 危険 for hazard as danger or risk of harm; 冒険 matches hazard only in the older sense of a risky venture or attempt, so it is rarely the word you want.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 危険きけんdanger
• ハザードhazard
• 危難きなんperil
• 冒険ぼうけんventure which is unlikely to succeed