There are 15 words that start with 'saponi'.
| saponin | saponify |
| saponine | saponins |
| saponite | saponines |
| saponites | saponified |
| saponifier | saponifies |
| saponifiers | saponifying |
| saponifiable | saponification |
| saponifications | |
Note: These 15 words that start with 'saponi' are found from the USA & Canada version of the tournament Scrabble word list.