There are 11 words that end with 'sids'.
| mysids | resids |
| ursids | capsids |
| jassids | diapsids |
| synapsids | euphausids |
| therapsids | sphenopsids |
| nucleocapsids | |
Note: These 11 words that end with 'sids' are found from the USA & Canada version of the tournament Scrabble word list.