nitrile / nitryl / nytril [ˈnaitrɪl]
nitrile – n. – Chemistry an organic compound with the general formula R—C≡N, an organic cyanide or materials made from these compounds
nitryl – n. Chemistry – either the nitro group – NO2 or the nitronium ion
nytril – n. – materials made from the polymer of vinyldiene dinitrile