There are 16 10-letter words that start with 'phy'.
| phylactery | phylaxises | phylesises | 
| phyllaries | phyllodium | phyllopods | 
| phyllotaxy | phylloxera | physically | 
| physicians | physicists | physicking | 
| physiology | phytoliths | phytotoxic | 
| phytotrons | ||
Note: These 16 10-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)