There are 11 13-letter words that start with 'spi'.
| spiegeleisens | spinelessness |
| spinsterhoods | spiritualisms |
| spiritualists | spiritualized |
| spiritualizes | spiritualness |
| spiritualties | spirochetoses |
| spirochetosis | |
Note: These 11 13-letter words that start with 'spi' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with spir, spin, spic, spit, spil, spik, spie, spif, spid, spiv, spig.
4-letter words start with 'spi' (5)