We don't have synonyms for petun yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are perun and petn.
(n) :
(rare, chiefly historical) Tobacco, especially in the context of its early acquisition from Native Americans by the French.
(n) :
(historical) A member of the Iroquoian "tobacco people", or Tionontati, a First Nation located on the southwest edge of the Georgian Bay of Lake Huron, west of the Huron territory in Southern Ontario.
(n) :
(rare, chiefly historical) Tobacco, especially in the context of its early acquisition from Native Americans by the French.
(n) :
(historical) A member of the Iroquoian "tobacco people", or Tionontati, a First Nation located on the southwest edge of the Georgian Bay of Lake Huron, west of the Huron territory in Southern Ontario.