There are 13 14-letter words that start with 'phy'.
| phycoerythrins | physicalnesses | 
| physiognomical | physiographers | 
| physiographies | physostigmines | 
| phytochemistry | phytogeography | 
| phytopathogens | phytopathology | 
| phytoplankters | phytoplanktons | 
| phytosociology | |
Note: These 13 14-letter words that start with 'phy' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with phys, phyt, phyl, phyc.
5-letter words start with 'phy' (2)