DELETERIOUS Synonyms: 90 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/deleterious
WEBSynonyms for DELETERIOUS: harmful, detrimental, adverse, damaging, dangerous, bad, injurious, hazardous; Antonyms of DELETERIOUS: beneficial, benign, harmless, innocuous, safe, useful, innocent, advantageous.
DA: 55 PA: 38 MOZ Rank: 75