PARGYLINE is a 9 letter Scrabble word worth 15 points.
a monoamine oxidase inhibitor synthesized from propargyl bromide and benzylmethylamine, (formerly) used to treat depression and hypertension; n -methyl- n -propargylbenzylamine, c₆ h₅ ch₂ n(ch₃)ch₂ c≡ch.