There are 10 words that start with 'phytop'.
| phytophagous | phytopathogen |
| phytoplankter | phytoplankton |
| phytopathogens | phytopathology |
| phytoplankters | phytoplanktons |
| phytopathogenic | phytoplanktonic |
Note: These 10 words that start with 'phytop' are found from the USA & Canada version of the tournament Scrabble word list.