There are 20 words that end with 'thly'.
| deathly | earthly | loathly |
| monthly | fifthly | laithly |
| ninthly | sixthly | soothly |
| swithly | tenthly | eighthly |
| fourthly | smoothly | bimonthly |
| seventhly | uncouthly | unearthly |
| trimonthly | semimonthly | |
Note: These 20 words that end with 'thly' are found from the USA & Canada version of the tournament Scrabble word list.