There are 17 words that end with 'ii'.
aalii | medii | genii |
radii | torii | congii |
bacchii | denarii | nauplii |
senarii | splenii | sartorii |
sextarii | retiarii | trapezii |
septenarii | gastrocnemii | |
Note: These 17 words that end with 'ii' are found from the USA & Canada version of the tournament Scrabble word list.