There are 41 words that end with 'onics'.
Note: These 41 words that end with 'onics' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with tonics, ionics, honics, ronics, monics, sonics, conics, ponics, bonics, donics, eonics, gonics, lonics, vonics, yonics.