We don't have synonyms for manslaughters yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are manslaughter.
(n) :
(law) The unlawful killing of a human, either in negligence or incidentally to the commission of some unlawful act, but without specific malice, or upon a sudden excitement of anger; considered less culpable than murder, but more culpable than justifiable homicide.
(n) :
(law) The unlawful killing of a human, either in negligence or incidentally to the commission of some unlawful act, but without specific malice, or upon a sudden excitement of anger; considered less culpable than murder, but more culpable than justifiable homicide.