There are 15 words that start with 'fert'.
| fertile | fertilely | 
| fertility | fertilize | 
| fertilized | fertilizer | 
| fertilizes | fertileness | 
| fertilities | fertilizers | 
| fertilizing | fertilizable | 
| fertilenesses | fertilization | 
| fertilizations | |
Note: These 15 words that start with 'fert' are found from the USA & Canada version of the tournament Scrabble word list.