Synonyms for Life-threatening:

• adj.

  •very dangerous (adjective)
  • mortal.

• Other synonyms:

  •
  • catching,
  • benign,
  • congenital,
  • clinical,
  • communicable,
  • asymptomatic,
  • chronic,
  • autoimmune.

Paraphrases for Life-threatening:

• Forward Entailment

  • Adjective
    threatening.

• Independent

  • Adjective
    serious, hazardous, fateful, grave, danger, harmful, disastrous, wicked, perilous, unsafe, dire, critical, menacing, hazard, risky.

• Other Related

  • Adjective
    fatal, deadly, lethal, mortal, dangerous, severe, debilitating.

Antonyms for Life-threatening:

• adj.

  • very dangerous
    invigorating, harmless.

• Other antonyms:

  • Other antonyms:
    noncrucial, noncritical.