There are 13 words that start with 'conden'.
| condense | condensed | 
| condenser | condenses | 
| condensate | condensers | 
| condensing | condensable | 
| condensates | condensible | 
| condensation | condensations | 
| condensational | |
Note: These 13 words that start with 'conden' are found from the USA & Canada version of the tournament Scrabble word list.