Synonyms and Antonyms of perilous
involving potential loss or injury <a perilous journey through hostile territory> Synonyms grave, grievous, hazardous, jeopardizing, menacing, parlous, dangerous, risky, serious, threatening, unhealthy, unsafe, venturesomeRelated Words dicey, insecure, precarious, treacherous, uncertain; ultrahazardous; chance, haphazard, random; distressing, sickening, unpleasant; ugly, wicked; 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, murderousNear Antonyms advantageous, beneficial, good; ultrasafeAntonyms harmless, innocent, innocuous, nonhazardous, nonthreatening, safe, unthreatening
Seen and Heard
What made you want to look up perilous? Please tell us where you read or heard it (including the quote, if possible).