Synonyms of 'homicidal'
If something is deadly, it is likely or able to cause someone's death, or has already caused someone's death.
a deadly disease currently affecting dolphins
A substance that is lethal can kill people or animals.
a lethal dose of sleeping pills
Someone who is murderous is likely to murder someone and may already have murdered someone.
This murderous lunatic could kill them all.
Thesaurus for homicidal from the Collins English Thesaurus
Homicidal is used to describe someone who is dangerous because they are likely to kill someone.