A really fast thesaurus... with lots of synonyms.
We don't have synonyms for lethally yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lethargy, lethal and lethality.
We don't have any synonyms for lethally yet.
Think lethally belongs in the thesaurus? Recommend it and we'll take a look.