There are 13 words that start with 'nephel'.
| nepheline | nephelite |
| nephelines | nephelinic |
| nephelites | nephelinite |
| nephelinites | nephelinitic |
| nephelometer | nephelometry |
| nephelometers | nephelometric |
| nephelometries | |
Note: These 13 words that start with 'nephel' are found from the USA & Canada version of the tournament Scrabble word list.