There are 16 words that start with 'phena'.
| phenate | phenates | 
| phenazin | phenacite | 
| phenakite | phenazine | 
| phenazins | phenacaine | 
| phenacetin | phenacites | 
| phenakites | phenazines | 
| phenacaines | phenacetins | 
| phenanthrene | phenanthrenes | 
Note: These 16 words that start with 'phena' are found from the USA & Canada version of the tournament Scrabble word list.