There are 14 words that start with 'semis'.
| semis | semises |
| semisoft | semisolid |
| semistiff | semisweet |
| semisacred | semisecret |
| semisolids | semishrubby |
| semiskilled | semisedentary |
| semisynthetic | semisubmersible |
Note: These 14 words that start with 'semis' are found from the USA & Canada version of the tournament Scrabble word list.