There are 6 8-letter words that end with 'usly'.
famously | joyously | odiously | porously |
venously | vinously | ||
Note: These 6 8-letter words that end with 'usly' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ously, gusly, husly.
6-letter words end with 'usly' (1)