There are 12 words that start with 'spaci'.
| spacial | spacier |
| spacing | spaciest |
| spacings | spacious |
| spacially | spaciness |
| spaciously | spacinesses |
| spaciousness | spaciousnesses |
Note: These 12 words that start with 'spaci' are found from the USA & Canada version of the tournament Scrabble word list.