There are 15 10-letter words that end with 'iously'.
| captiously | cautiously | graciously |
| lusciously | gloriously | factiously |
| spaciously | speciously | spuriously |
| preciously | previously | studiously |
| tortiously | usuriously | uxoriously |
Note: These 15 10-letter words that end with 'iously' are found from the USA & Canada version of the tournament Scrabble word list.