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Showing results for lethal. Search instead for lethean.
Definitions

lethal

[lee-thuhl] / ˈli θəl /
ADJECTIVE
deadly
Synonyms
STRONGEST
dangerous destructive devastating fatal harmful malignant mortal murderous noxious pernicious poisonous virulent
WEAK
baleful deathly hurtful mortiferous mortuary necrotic pestilent pestilential
Antonyms
STRONGEST
harmless healthy helpful kind wholesome
WEAK
beneficial life-giving

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.