There are 7 15-letter words that start with 'ster'.
| stereochemistry | stereoisomerism | 
| stereologically | stereotaxically | 
| stereotypically | steroidogeneses | 
| steroidogenesis | |
Note: These 7 15-letter words that start with 'ster' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with stere, stern, steri, stero, sterl, stert, stera, sterc.
5-letter words start with 'ster' (2)