There are 14 words that start with 'proge'.
progeny | progeria |
progenies | progerias |
progestin | progenitor |
progestins | progenitors |
progestogen | progesterone |
progestogens | progesterones |
progestogenic | progestational |
Note: These 14 words that start with 'proge' are found from the USA & Canada version of the tournament Scrabble word list.