Definitions

lethiferous

[li-thif-er-uhs] / lɪˈθɪf ər əs /

ADJECTIVE

destructive

Synonyms

STRONGEST

calamitous cataclysmic catastrophic damaging deadly detrimental disastrous fatal harmful hurtful lethal pernicious ruinous suicidal toxic

WEAK

annihilative baleful baneful cancerous consumptive cutthroat deleterious dire eradicative evil extirpative fell internecine mortal noisome noxious pestiferous pestilential slaughterous venomous wrackful wreckful

Antonyms

STRONGEST

advantageous assisting beneficial blessed favorable fortunate harmless healthful helpful kind life-giving wholesome

WEAK

aiding building creative encouraging hopeful positive productive