DEADLY Synonyms: 324 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/deadly
WEBSynonyms for DEADLY: lethal, fatal, poisonous, infectious, infective, killer, harmful, dangerous; Antonyms of DEADLY: healthy, healthful, beneficial, nonfatal, wholesome, nonlethal, salutary, salubrious.
DA: 61 PA: 70 MOZ Rank: 37