The Collaborative International Dictionary
Poisonable
Poisonable \Poi"son*a*ble\, a.
Capable of poisoning; poisonous. [Obs.] ``Poisonable heresies.''
--Tooker.Capable of being poisoned.
Wiktionary
poisonable
a. 1 Capable of being poisoned. 2 (context obsolete English) poisonous