Synonyms and Antonyms of perilous
- a perilous journey through hostile territory
dicey, insecure, precarious, treacherous, uncertain
distressing, sickening, unpleasant
adverse, bad, baleful, baneful, deleterious, detrimental, evil, harmful, hurtful, ill, inimical, injurious, malignant, nasty, noxious, pernicious, pestilent
deadly, deathly, destructive, dire, fatal, fateful, fell, killer, lethal, mortal, murderous